The Role of the Total-Quality-Management (TQM) Drivers in Overcoming the Challenges of Implementing TQM in Industrialized-Building-System (IBS) Projects in Malaysia: Experts’ Perspectives

: Total quality management (TQM) is a systematic management technique for developing a process-driven culture inside an organization to achieve quality and customer and employee satisfaction. TQM has started to impact global business systems, and is extensively regarded as a management “revolution”. The implementation of TQM in the industrialized building system (IBS) in Malaysian projects has not been treated in much detail, although it is essential. This research intended to assess TQM adoption in IBS projects and identify how TQM drivers will help to overcome TQM-implementation challenges. This study utilized the mixed method by developing a semi-structured interview and survey, while the respondents were experts from TQM and IBS consulting ﬁrms. The content-validity approach was used, depending on 14 interviews and 28 responses to a distributed questionnaire. The ﬁndings indicate that TQM adoption of IBS projects is extremely poor. According to experts, local ﬁrms are still unable to execute TQM because they are reluctant to implement the TQM system as a strategy implementation across the construction process. Furthermore, according to the content validity ratio (CVR), there was an agreement that TQM would provide substantial beneﬁts to IBS projects, such as offering cooperative associations, excellent communication, enhanced customer gratiﬁcation, cost reductions, and productivity improvements. This study provided practical evidence of the fact that if the organizations adopted these 23 drivers of TQM they could overwhelm the challenges of TQM implementation in IBS projects. Thus, the stated factors were trustworthy, as indicated in the transcripts of interviews, and relying on the plurality of expert assessments. This study offers a valuable list of challenges and drivers for managers of the projects as guidelines to help them adopt TQM in IBS projects.


Introduction
The key objective of every construction project is to meet the three fundamental criteria of cost, time, and quality [1,2]. Urbanization has grown rapidly for construction, resulting in a significant rise in resource development in many regions [3,4]. Since the early 1980s, quality management, also known as total quality management (TQM), has been an important focus for organisations, business administrators, academic scholars, and practitioners of industry [5]. Total quality management has been considered a vital successful implementation in the global construction industry. It has become a critical sections, first, the literature review and research methodology are introduced, then, the result and discussion. A conclusion section is given at the end of this paper and, last but not least, future research directions are further proposed.

Total Quality Management
Project participants' quality requirements are changeable, and determined by their lives, preferences, beliefs, social systems, and education [37]. Today's scenario of fast technological progress and severe competition forces organisations to reconsider their tactics and strive to incorporate novel management concepts and solutions [38]. The principle of TQM is one of the most widely utilised concepts for managing the quality of products and services [39]. TQM has been embraced as a new strategy because of its broad application to management systems and processes; its adaptability has been expanded to manage environmental considerations, which have become increasingly vital for industries and the rest of nature all over the world [40]. Given the technical, political, financial, and environmental aspects that have transpired in recent decades, an organization's capacity to obtain and keep a significant advantage has become a serious issue [41].
TQM evolved as a consequence of quality evolution. The attention broadened to the quality of all concerns inside the company. The four stages of quality evolution include investigation, quality control, quality assurance, and TQM. TQM is an approach that aims to match quality output while meeting customer expectations. The level of quality in TQM is assessed by consumers [42]. Quality standards, such as the Deming Prize and the Malcolm Baldridge National Quality Awards (MBNQA) ISO 9000 series, outline the theories and values that include TQM [43][44][45]. The eight TQM concepts are summarised in Figure 1. accomplishing successful TQM implementation. This research is significant, because it adds to the body of knowledge and beneficial data acquired from IBS participants in the Malaysian construction sector. Furthermore, the present study enriches the existing literature by highlighting the relationship between TQM and IBS, which has been discussed from the perspective of experts in the Malaysian construction sector. In the following sections, first, the literature review and research methodology are introduced, then, the result and discussion. A conclusion section is given at the end of this paper and, last but not least, future research directions are further proposed.

Total Quality Management
Project participants' quality requirements are changeable, and determined by their lives, preferences, beliefs, social systems, and education [37]. Today's scenario of fast technological progress and severe competition forces organisations to reconsider their tactics and strive to incorporate novel management concepts and solutions [38]. The principle of TQM is one of the most widely utilised concepts for managing the quality of products and services [39]. TQM has been embraced as a new strategy because of its broad application to management systems and processes; its adaptability has been expanded to manage environmental considerations, which have become increasingly vital for industries and the rest of nature all over the world [40]. Given the technical, political, financial, and environmental aspects that have transpired in recent decades, an organization's capacity to obtain and keep a significant advantage has become a serious issue [41].
TQM evolved as a consequence of quality evolution. The attention broadened to the quality of all concerns inside the company. The four stages of quality evolution include investigation, quality control, quality assurance, and TQM. TQM is an approach that aims to match quality output while meeting customer expectations. The level of quality in TQM is assessed by consumers [42]. Quality standards, such as the Deming Prize and the Malcolm Baldridge National Quality Awards (MBNQA) ISO 9000 series, outline the theories and values that include TQM [43][44][45]. The eight TQM concepts are summarised in Figure  1. There are several definitions of TQM, and they usually vary in which management responsibilities are included among the concepts [46]. The quality management system There are several definitions of TQM, and they usually vary in which management responsibilities are included among the concepts [46]. The quality management system (QMS) is defined as the managerial structure, roles, methods, procedures, and management resources used to implement the guidelines and activity lines required to achieve a company's quality goals [46]. Additionally, it is a collection of quality actions performed throughout the creation of a product, procedure, or service, including protection and evaluation [47]. Furthermore, it is seen to be appropriate as a foundation for incorporating sustainability principles in sectors such as project development [48,49]. TQM enables each employee to have the chance to engage, serve and establish a sense of ownership and responsibility [50]. Many studies have been conducted on the implementation of TQM, and it is considered that the advantages of increased customer satisfaction, higher-quality goods, and increased market share are frequently acquired after the deployment of TQM by construction organisations [51,52]. According to [53], people-related TQM becomes essential for both universities and people-related TQM practices. TQM is a strategy of constantly improving organisational quality that involves management, workers, consumers, and the business process in digital-based service firms [54]. Total quality management approaches have a considerable influence on the Social Security Corporation's knowledge-management process [55]. It demands a total shift in the business environment and management strategy from the conventional model of top management issuing instructions and people just accepting them [56].
To understand the significance of TQM and its effect, the advantages of TQM for the company must be understood [57]. A case-study investigation by Bardoel and Sohal [58] highlighted the advantages of TQM adoption in seven Australian construction firms. The stated benefits include improved process control, resulting in continuity from design to completion; a reduction in construction-process time; a decrease in the supply of products destroyed in transportation and construction; a diminished delivery schedule to the site; reduced chemical blowback; performance-improvement estimation; and improved customer expectations of the organisation [7]. It has had a tremendous influence on corporate success in several Western organisations, and has remained prominent in the business world since the 1990s [59]. Waldman states that, for organisations that embrace this management strategy, TQM provides greater quality and productivity, reduced waste, more production, and improved customer service [58].
Furthermore, several of the key advantages of a TQM programme, such as improved knowledge and the attention of all workers to meeting customer needs, have still not been realised in construction. Customer delight, fulfilling requirements, gaining a greater market share, improving efficiency, eliminating defects, increasing sales by X percent, and decreasing expenses by Y percent could all be accomplished by implementing TQM values into all elements of the organisation. The fact is that most corporations are far beyond getting the maximum advantages of quality standards [60]. The true benefit of implementing quality in the Malaysia construction industry are to increase operation and attain a particular degree of customer satisfaction [61,62].

Barriers to Total Quality Management
The construction sector tends to confound TQM with quality control (QC) and quality assurance (QA), assuming that adherence to QA standards such as ISO 9001 and 9002 is the extent of TQM's implementation on construction projects [63]. Due to this new misconception, both terms are now used similarly. Some construction issues, such as fluctuating demand and custom works (non-steady conditions), make TQM adoption challenging, and TQM can only assist organisations in dealing with such changes [64,65]. The barrier generated by traditional or conventional practice is one of the key obstacles hindering greater acceptance and adoption of TQM in the construction sector [66]. One example is the conventional method of evaluating project bids, which places the most focus on cost [67]. It is well known that the customer frequently chooses the contractor based mostly on cost, with little regard for prior experience, present workload, and reputation for excellence [64]. This scenario provides little motivation for contractors to implement TQM values.
TQM deployment in a company needs a fundamental organisational culture shift. Transforming a company's culture is challenging and frequently encounters reluctance [68]. The difficulty in adopting TQM arises from the belief that TQM is not a slogan, technique, or strategy; rather, it is an organisational philosophy [69]. TQM is a wide enough paradigm to serve as the framework or cornerstone of an organisation's culture [70]. Hence, adopting TQM may involve changing, rather than just altering, the firm's culture [71,72].
TQM implementation is one of the most difficult challenges for any organisation. Some companies find it difficult to adopt TQM effectively and satisfactorily; they also observe impediments or limitations that impede TQM adoption [73]. Because of these constraints, companies have not realised the anticipated advantages of adopting TQM [74]. Among several challenges in adopting TQM is the lack of a method for monitoring and controlling the overall progress of TQM adoption [75]. Furthermore, there is an inability to offer training skills just before the implementation of TQM [76]. Finally, considering TQM as an internal process and neglecting to include suppliers, subcontractors, and others in the system process makes TQM implementation very challenging [77].

Conceptual Framework
It is commonly acknowledged that several fundamental flaws hinder practitioners from becoming quality organisations; this, among other things, significantly impacts the industry's attractiveness. Construction firms' goals may vary, but the significance of customers is a shared concern. The capacity of construction firms to adapt to changing client needs is critical for long-term success. All firms, irrespective of their size or financial situation, are participants in the quality revolution; QM is regarded as being as crucial for small organisations as it is for big organisations, yet there are significant challenges limiting organisations from fully implementing TQM. The essence of the construction phase can occasionally be tracked to this issue. That is, projects are frequently extremely massive, labour intensive, and rarely located on the same site, the manpower is transient, and demand fluctuates, depending on the client's point of view of the value of the construction project. The invasive complexity, ambiguity, and instability of most construction projects challenge even experienced managers. As a result, construction projects are complex endeavours that necessitate coordinating the efforts of many people, each of whom brings their unique perspective and set of interests to the table. The project plan also tends to evolve several times throughout the construction process, which can cause delays and ultimately lower the quality of the finished product. The construction industry has been hesitant to embrace the comprehensive principle of TQM [78]. Following a similar trend, the construction sector has generally been resistant to change, but it is currently attempting to catch up with the TQM revolution that has transformed many companies [79]. One more barrier, described as ineffective or non-existent quality-management procedures, further clarified the fact that attaining reasonable levels of quality in the construction industry has long been an issue, due to the significant expenditure of time, finances, and materials, both material and human, wasted each year [80]. Consequently, based on the literature review, problem statement, and research gap, the conceptual framework of this study has been developed as illustrated in Figure 2.

Research Methodology
The literature review was carried out to investigate the whole TQM adoption in IBS construction projects. As shown in Figure 3 as the research design, the data was acquired through books, scientific journals, international conference articles, governmental seminars sponsored by the Construction Industry Development Board (CIDB), an Industrialised Building System (IBS) centre, and resources accessible on the internet. After an exten-

Research Methodology
The literature review was carried out to investigate the whole TQM adoption in IBS construction projects. As shown in Figure 3 as the research design, the data was acquired through books, scientific journals, international conference articles, governmental seminars sponsored by the Construction Industry Development Board (CIDB), an Industrialised Building System (IBS) centre, and resources accessible on the internet. After an extensive literature review, the study developed the data-collection instruments: interviews and a structured-survey questionnaire. A mixed-method approach was used to obtain information on TQM implementation in IBS building projects.

Research Methodology
The literature review was carried out to investigate the whole TQM ad construction projects. As shown in Figure 3 as the research design, the data through books, scientific journals, international conference articles, govern nars sponsored by the Construction Industry Development Board (CIDB), a ised Building System (IBS) centre, and resources accessible on the internet. A sive literature review, the study developed the data-collection instrument and a structured-survey questionnaire. A mixed-method approach was used formation on TQM implementation in IBS building projects.  Fifty-five TQM experts were called to the session for an interview and to verify the important variables for TQM benefits, challenges, and drivers in IBS construction projects. Prior studies have indicated that a sample size of 25 to 75 [81] or 15 to 35 [82] respondents are acceptable. Nevertheless, according to Sachs et al. [83], the sample size is influenced by the relevant subject, the kind of questionnaire survey, and the degree of input needed. Similarly, Shen, Q., Liu, G. [84], and Sachs et al. [83] utilised a sample size of 36 and 29, respectively. Mason [85] states that the saturating factor, in which new participants duplicate the same data, is critical in determining sample size for qualitative investigations. Only 42 respondents contributed to the invitation in this study, with 14 accepting the invitation for interview and 28 indicating their readiness to participate in a structured questionnaire for validity and judging. Hence, the following two steps of exploring the key factors were used in this study:

•
Personal interview: Face-to-face and virtual sessions with 14 professionals who analysed qualitative data utilising thematic analysis [86]. The thematic-analysis approach was scrutinised in four major stages, as shown in  respectively. Mason [85] states that the saturating factor, in which new participants duplicate the same data, is critical in determining sample size for qualitative investigations. Only 42 respondents contributed to the invitation in this study, with 14 accepting the invitation for interview and 28 indicating their readiness to participate in a structured questionnaire for validity and judging. Hence, the following two steps of exploring the key factors were used in this study: • Personal interview: Face-to-face and virtual sessions with 14 professionals who analysed qualitative data utilising thematic analysis [86]. The thematic-analysis approach was scrutinised in four major stages, as shown in Figure 4. • Determining the range of overlapping: This made use of a panel for assessing content. The method utilises a content-evaluation panel of persons experienced in TQM implementation. The panel consists of 28 TQM experts who were selected to participate in a survey questionnaire. Each consultant obtained a set of items during the interview phase. Everyone was requested to individually contribute to the following question for each item: are the measurable benefit, difficulty, and success variables important for TQM application in IBS construction projects? • Agree it is important; • Perhaps valuable, but not important; • Disagree: it is not needed.
After each section/theme, the experts involved were asked open-ended questions to allow them to express their perspectives in their own way. The comments of all experts were combined, and the number expressing "agree it is vital" for every item was obtained. After each section/theme, the experts involved were asked open-ended questions to allow them to express their perspectives in their own way. The comments of all experts were combined, and the number expressing "agree it is vital" for every item was obtained. Each of the following two hypotheses is supported by well-established principles of psychophysical science [81]: • Any component whose behaviour is considered "significant" by more than 50% of the expert panel has some measure of content validity.

•
The higher the proportion of the expert panel (more than 50%) who see the element as "significant," the higher the amount or level of its content validity.
With these hypotheses taken into account, the following formula was used for the content validity ratio (CVR) in this study. CVR is defined as a method that involves asking experts to judge whether the information or ability that each question on the questionnaire refers to is "important," "helpful, but not required," or "not essential [81,[87][88][89]: in which n e is the number of experts who believe it is essential, and N represents the overall number of experts on the panels. CVR is a straight linear conversion of the proportion who agree it is essential.

1.
Item selection: The CVR score is met for every item, according to the content assessment panel. To fulfil the 5% criterion, for instance, a CVR minimum of 0.49 is necessary.
Only elements with CVR values that satisfy this requirement are maintained in the final version of the future concern. This premise is utilised because using the CVR to decline items does not prevent using a discrimination index or other standard item-analysis approach to choose further those questions to be maintained in the test's final structure [81,87,88].

2.
The content-validity index (CVI): This reflects the extent to which believed excess arises between competence to perform in a specific TQM-implementation area and factors on the research under examination. Functionally, it is the averaged proportion of overlapping between the measurement items and the TQM-implementation domain [81].

Results and Discussion
The shift into a TQM company usually relies on the extent to which the organisations have effectively adopted quality management methods. Based on the content-validity approach, this study was designed to address a gap in the body of the literature regarding TQM adoption in various IBS projects in Malaysia, and to offer a complete list of TQM principles, barriers, and drivers of TQM implementation in IBS projects. The findings of this study will be revealed in the parts that follow: Table 1 illustrates the demographics of the construction professionals who participated in the interviews. They were chosen based on their experience and engagement in TQM and IBS construction projects. The fourteen construction specialists have TQM and IBS experience, varying from 6 to 20 years. Their engagement with TQM implementation was assessed as moderate, advanced, and professional, the latter indicating extreme consciousness of TQM implementation. Three key issues were established in this study: TQM implementation in IBS projects in Malaysia, barriers preventing local and small, and medium-sized enterprises (SMEs) from implementing TQM in their construction projects, and critical factors of effective TQM implementation in IBS projects.

. TQM Implementation in IBS Projects
The overall assessment of TQM implementation was at level 0, "traditional level", and level 1, "modelling level." Furthermore, several professionals questioned believe that applying TQM in IBS projects in Malaysia has not reduced costs or time, and output remains poor, due to regulatory requirements. However, for development companies, TQM is not mandatorily needed, and TQM is applied only if the client requests it. On the other hand, few experts claim that the TQM philosophy is not addressed correctly and that what Malaysia is doing is simply the standard methodology, which is ranked as level 1. According to most experts, TQM implementation in IBS projects is the practice of monitoring construction projects effectively, which demands excellent communication. TQM is not widely used or implemented; some just simulate the construction aspects. TQM should be thoroughly implemented in IBS construction projects throughout the construction phase, along with the planning phase, project implementation, approval, and management. As a result, it is advised that organisations pledge to TQM adoption, begin implementing TQM procedures within their projects, and cooperate to effectively manage TQM initiatives. Motivation and dedication to TQM techniques are required for effective TQM-implementation improvement. Each division of the construction sector should be accountable for enhancing construction quality and improving worldwide efficiency.
Professionals were also questioned for their perspectives on TQM implementation in domestic and global companies, as well as the top firms and small and medium-sized firms, and to assess the various kinds of IBS construction projects with TQM adoption. The findings indicate that multinational organisations are often prepared to employ TQM in any kind of IBS project, since they have implemented the TQM approach and offer the necessary resources. Those companies are classified as successful companies. Domestic SMEs, on the other hand, are still not fully prepared for this transformation, since they lack the TQM approach owing to the initial expense and lack of cultural shift. The findings also show that when clients request TQM implementation, the majority of those firms use a third-party consultant to execute the TQM-process operations. Regarding TQM implementation in several sorts of IBS projects, the discourse indicated that TQM had been adopted in several towers and high-rise buildings within Kuala Lumpur, Selangor, Johor Bahru, and the Perak regions. Some clients may demand the implementation of the TQM process in mediumand low-rise buildings or apartments, but it is not common, since it is not mandatory, and therefore depends on the client's needs. The TQM system was considered valuable for all forms of IBS construction projects and useful to all construction players. Thus, local organisations must boost their utilisation of TQM in their construction projects.

Benefits of TQM Implementation in IBS Construction Projects
The significance of TQM has been highlighted in all aspects in recent years [90]. Organizations have extensively adopted TQM as a concept for ensuring the quality of products and services, efficiency, and customer satisfaction [91]. TQM is generally regarded by quality managers and experts as a quality strategy of management [6], and it has played an important role in the evolution of management practices [92]. TQM implementation in IBS projects will significantly benefit the construction sector and stakeholder interactions. TQM application results in increased customer satisfaction, cost reductions, and higher prestige for people and organisations, apart from the competition. The advantages of TQM implementation are obtained from previous studies [93,94]. Implementing TQM would improve selection potential during the tender process [95]. In this approach, TQM implementation helps reduce expenses, enhance revenues, and protect market dominance [96]. During the interview, these concepts were addressed by the professionals. Table 2 illustrates the group of items created after changing the proposed measure for TQM implementation. Table 2. TQM-Implementation Benefits in IBS Projects.

TQMB1 TQM adoption will introduce companies to a different way of thinking about projects TQMB2
Implementation of TQM significantly improves the efficiency of the IBS projects TQMB3 TQM environments guarantee that proactive staff are suitably rewarded TQMB4 Quality improvements should finally attempt to improve customer satisfaction in terms of acquiring information via surveys and feedback TQMB5 Successful TQM adoption will result in cost savings TQMB6 Increased overall project timeline TQMB7 Members of the project team will be able to communicate more effectively TQMB8 Reduction in workplace accidents, wastage, and poor manufacturing TQMB9 Improved significant benefit and profitability

TQM Implementation Challenges in IBS Projects
TQM adoption demands modifications to the leadership context as well as the projectexecution processes. Although the study highlighted TQM's importance in obtaining the greatest outcomes, it also identified the challenges that prevented efficient TQM implementation. According to the study, the most significant barriers to TQM adoption were poor-quality leadership, a lack of customer focus, poor-quality strategy, improper management of human resources, and insufficient collaboration. Moreover, these modifications will have an impact on the present organisational structure and work patterns, and the firm will need to become familiarised with the TQM process.
According to the literature-review assessment, players find a substantial barrier to using the system and gaining a greater understanding of TQM implementation. The difficulties were examined with the specialists in this area, and the relevant challenges were identified. TQM deployment in IBS projects is viewed as an unstable technique by most local firms, owing to the unpredictability of process changes and the expense of the TQM-system management procedure throughout the construction process. The most critical problem is understanding TQM techniques, since technology is always improving. Furthermore, it was stated that TQM has often needed teamwork among stakeholders, which is still a challenge in areas where people are more experienced in the conventional procedure of construction-project delivery. Individuals are hesitant to shift, and the industry is having difficulty persuading them.
Due to the unpredictability of construction-project needs in medium-and low-rise buildings, local SMEs have difficulty securing the preliminary cost of implementing the TQM system in their organisation. In this regard, top-management decision making amongst local stakeholders did not admit the implementation of TQM systems. Some professionals comment on the ambiguities of the communication process, which includes the TQM-system compatibility process. Developing personal and team enthusiasm to utilise TQM is also highlighted as one of the main problems of TQM implementation. Some experts have emphasised that few organisations are utilising TQM, and most construction companies are not adopting TQM, which is also a hurdle for TQM dissemination.
TQM adoption in IBS projects is hampered by local players' unawareness and lack of comprehension of the TQM system. Consequently, organisations should deliver enough training and improve the professional abilities needed to apply TQM. This has also been emphasised by Arditi et al. [97], as delivering extensive training programmes will promote TQM acceptance and productivity. According to Keinan et al. [98], providing more precise knowledge regarding TQM expenses and advantages would aid in providing sustainable structures.

Drivers of Successful TQM Implementation in IBS Projects
The significance of effective TQM implementation is reviewed with experts in this part; a thematic analysis was performed, to identify the critical drivers for successful TQM implementation in medium and low-rise construction IBS projects across Malaysian organisations. Before establishing the critical success variables, the experts thoroughly addressed several concerns. The following are the findings of the interview discussion. TQM implementation relies on a common commitment from all parties involved. The lack of commitment of local organisations to TQM adoption in the IBS construction projects was emphasised. Professionals highlighted that, although requiring TQM implementation forces players to pledge their commitment, policymakers must also promote the implementation and integration procedures that minimise ambiguities in deploying new technologies in IBS construction projects. According to the literature, stakeholders' dedication is required to discover a mechanism to process and implement TQM in IBS construction projects [66]. Strategies can have an impact on the supply chain by encouraging innovation, enabling manufacturers to promote innovative ideas, and emphasising competitiveness in the market. Appropriate coordination across the supply network and within the essential role of the suppliers would result in frequent development [67]. According to some professionals, the construction-sector strategy substantially influences TQM adoption, since it directs project stakeholders towards optimal practices. The rules will assist companies' top-management decision making in becoming more dedicated to TQM implementation and increasing TQM deployment in IBS construction projects. Explaining responsibilities and restrictions will also establish a better working atmosphere. The policy may assist with TQM implementation by making it obligatory for all local organisations.
TQM adoption was viewed as an integrated process, involving individuals, procedures, and technology, in the context of IBS construction-project processing. From the design process through project completion, an efficient implementation strategy is employed to control construction performance effectively. People (the IBS contractor, IBS manager, consultant, and technician) are critical components in a TQM culture. They handle both the procedure and the technological depiction of the construction project. People plan the sequence of labour tasks and set a meaningful definition of the outputs and inputs of each step. Employees must have the necessary professional skills and understanding of the TQM process to provide effective and more-successful project delivery. Teamwork amongst SMEs in the TQM environment is essential in the IBS construction project. It contributes to improving project outcomes, having the correct mindset, and inspiring each team to ensure effective TQM adoption. The TQM implementation strategy should explicitly outline the process, instruments, degree of coordination and interaction, accountabilities, delivery and time frames. All these factors result in a more effective implementation of TQM.

Extent of Overlap and Judgment-Validity Measurement
This section aimed to assess the degree of overlapping and validate the retrieved elements discovered during the interviews. Data obtained from the interviews were recorded and then converted into the structured questionnaire for the professionals' judgement and analysing of the content validity ratio (CVR) for each element. If the judgement checklist disagreed with the importance of the element or factor assessed for successful TQM implementation, the relevant questions might be highlighted. Therefore, if the professionals agreed, we inferred that they were either "all incorrect" or "all correct." There was no foundation to question clear agreement, since they are specialists in TQM implementation in IBS construction projects. Depending on the situation, we could be certain that the factor was or was not genuinely crucial. When agreement was not reached, and the professional judgement was split fifty-fifty, issues occurred [81]. The outcomes of the interviewees are described in the sections below. Table 3 describes the sample distribution and the background of respondents from the organisations where the study was performed. As shown in the table, the majority of participants (39%, n = 11) had a master's degree, followed by a bachelor's degree (32%, n = 9) as well as a PhD (28%, n = 8). According to Table 3, the majority of respondents in the sample (57%, n = 16) seemed to have more than 16 years of experience. According to Table 3, most of the respondents in the sample (57%, n = 16) seemed to have more than 16 years of experience. This is followed by less than 5 years' experience, from 5 to less than 10 years, 10-15 years, and more than 20 years with 7%, (n = 2), 5-10 years representing 14% (n = 4), 10-15 years representing 22% (n = 6), and more than 20 years representing 0% (n = 0). Regarding the nature of business (NOB), 39% (n = 11) are contractors, 25% (n = 7) are consultants, 29% (n = 8) are clients/developers, and 7%( n = 2) are others, including providers. In terms of position, construction-project managers have the highest representation (43%, n = 12), followed by site/residential engineers (25%, n = 7), and QS/planning engineers (18%, n = 5), and the smallest proportion represents junior managers (14%, n = 4). In terms of organisational type, it can be seen that the majority of respondents are from the private sector (61%, n = 17), followed by the public sector (36%, n = 10), and the fewest are in others (3%, n = 1). Finally, the table shows that the majority of respondents in the sample (43%, n = 12), have from 10 to less than 15 years of experience in IBS projects, followed by more than 20 years (28%, n = 8), from 5 to less than 10 years (18%, n = 5), and the lowest number (11%, n = 3) have from 1 to less than 5 years of experience.

TQM Implementation Benefits in IBS Projects
Total-quality-management approaches with decent principles have also been proven to have a favourable and substantial impact on IBS projects. By implementing TQM procedures, organisations can enhance their employees' knowledge and skills about the optimal use of resources. Employees are more energized and inspired when they operate in a workplace that assures their products and services provide outstanding value to society while also protecting the natural environment. Based on the findings of this study, if a company can properly manage its TQM operations, it will improve workers' skills, capacities, and desire to utilise materials effectively, resulting in increased efficiency. Table 4 illustrates the frequency (F) analysis of the list of TQM values in IBS projects. The highest number of respondents agreed with the TQM values stated in medium and low-rise IBS projects. With CVR values of 0.357 and higher, there was consensus agreement on the values of TQM-system use in different IBS project classes. All values had a CVI of 0.516. According to the findings, TQM adoption is not only advantageous for massive projects but also for mid-and low-rise buildings. Thus, local organisations should commence using TQM technologies, and determine their issues and strengths to incorporate TQM into upcoming projects.

Challenges of TQM Implementation in IBS Projects
The construction sector tends to confound TQM with quality control (QC) and quality assurance (QA), assuming that adherence to QA standards such as ISO 9001 and 9002 is the extent of TQM's implementation on construction projects [63]. Due to this new misconception, both terms are now used similarly. Some construction issues, such as fluctuating demand and custom works (non-steady conditions), make TQM adoption challenging, and TQM can only assist organisations in dealing with such changes [64,65]. The challenges generated by traditional or conventional practice are one of the key obstacles hindering greater acceptance and adoption of TQM in the construction sector [66]. One example is the conventional method of evaluating project bids, which places the most focus on cost [67]. It is well known that the customer frequently chooses the contractor based primarily on cost, with little regard for prior experience, present workload, and reputation for excellence [64]. This scenario provides little motivation for contractors to implement TQM values.
TQM deployment in a company needs a fundamental organisational-culture shift. Transforming a company's culture is challenging, and frequently encounters reluctance [68]. The difficulty in adopting TQM arises from believing that it is not a slogan, technique, or strategy; rather, it is an organisational philosophy [69]. TQM is a wide enough paradigm to serve as the framework or cornerstone of an organisation's culture [70]. Hence, adopting TQM may involve changing, rather than just altering, the firm's culture [71].
TQM implementation is one of the most difficult challenges for any organisation [99]. Some companies find it difficult to adopt TQM effectively and satisfactorily; they also observe impediments or limitations that impede TQM adoption [100]. Because of these constraints, companies have not realised the anticipated advantages of adopting TQM [74]. Among several challenges in adopting TQM is the lack of a method for monitoring and controlling the overall progress of TQM adoption [75]. Furthermore, there is the inability to offer training skills just before the implementation of TQM [76]. Finally, considering TQM as an internal process and neglecting to include suppliers, subcontractors, and others in the system process makes TQM implementation very challenging [77].
Moreover, TQM is a dynamic process that needs reshaping and reorganizing of the construction procedure to handle numerous issues at every TQM-implementation stage.
Organizations and the construction sector confront significant hurdles in successfully transitioning from traditional to TQM technologies, and assigning funds and budgets. Construction stakeholders have implementation issues in determining when and where, as well as how, to adopt TQM. This article asserts that overcoming obstacles is necessary throughout TQM, highlighting 20 challenges that prevent local organisations from implementing TQM in IBS projects, as illustrated in Table 5.

Drivers of Successful TQM Implementation in IBS Projects
In the 1980s, among quality management operators, scientists, and consultants, a revolutionary idea known as total quality management emerged (TQM) [128]. TQM is described as a concept as well as a collection of guiding principles that serve as the cornerstone of a constantly improving company [129]. Over the last decade, several organisations have emphasised total quality management (TQM) to increase earnings, market dominance, and productivity, as seen in Table 6 [130]. Even though TQM is a proven technique for success in the construction industry, services, and manufacturing, numerous firms failed in their initiatives for various reasons, including a lack of senior management commitment, disregarding customers, and so on [131].
The current study explored the drivers and challenges associated with implementing TQM in IBS projects. Moreover, the study aimed to improve contextual understanding of how the stated drivers and challenges impact TQM implementation in various issues in IBS projects, as defined by the initial onset and level of TQM adoption in a firm. Based on the gathered literature on TQM integrated technologies and IBS on construction-progress observation, a conceptual framework on the topic of the IBS construction environment has been established, as illustrated in Figure 3. This framework intends to improve knowledge of both systems and operations, to effectively establish a TQM framework for progress detection using TQM-integrated technologies. Furthermore, this framework could be used to analyse some of the challenges and drivers of efficient TQM implementation in the field of IBS performance assessment. Effective TQM adoption is heavily reliant on successful and effective top-management commitment, leadership, and communication channels with practitioners, operational technologies, and systems. However, the implementation of advanced technologies requires a high level of dedication and effective leadership, which proves to be a barrier to TQM adoption in IBS projects.

Conclusions
This study examines the challenges and drivers of TQM implementation in IBS projects. Respondents were also carefully considered and came from the construction sector, with considerable relevant experience in TQM use in IBS projects. The results show that TQM drivers have a considerable and beneficial influence on IBS projects and can significantly improve construction-business processes. The findings also indicated that TQM adoption is significant amongst large-scale construction organizations, and TQM implementation is needed for massive IBS projects. Indeed, local companies are having difficulty adopting the TQM system and will be required to develop TQM technological and application abilities. Furthermore, depending on the CVR significance of 0.370, this study offers a key list of challenges and elements for success that should be addressed to resolve the key problem of poor TQM adoption in IBS projects. This paper contributes to studying TQM and IBS projects by presenting empirical evidence for an association between TQM and IBS-project practices and adaptability performance.
This current study has many practical and theoretical contributions. First, in terms of managerial contribution, this study is important for Malaysia's construction industry as a guide to achieve sustainability, particularly from the standpoint of construction experts. This study recommended that local and small and medium-sized firms commence TQM implementation and motivate experts to strengthen their TQM adoption abilities. The study concludes that implementing a TQM approach in IBS projects within an organizational culture emphasizes TQM and builds a solid basis for a company's market competitiveness. Second, in terms of theoretical contribution, this paper contributes to extending the body of knowledge regarding TQM implementation and IBS projects by presenting empirical evidence for an association between TQM and IBS-project practices and adaptability performance. In addition, this study will help future researchers interested in implementing TQM in the construction industry.
Although this study has many contributions to make, there are still some limitations, including a limited data sample, the structure of a self-reported questionnaire, and a statistical-finding restriction. This study was carried out by utilizing a mixed method, which includes semi-structured interviews and a structured questionnaire based entirely on professionals with TQM-project experience, specifically in IBS projects, from the public and private sectors in Malaysia. As a consequence, the data were considered to be trustworthy, according to conducted interviews and expert perspectives. Future studies can obtain more data and utilize other construct measuring methodologies to conduct more analysis, to better understand the connection between TQM and other industries. In the future, it would be suitable to address a bigger sample of respondents in the same positions and with the same level of education, to increase the database and help to improve the quality of outputs. Additionally, future research should look at the correlation between the driving variables and TQM-adoption benefits. Likewise, investigating the aforementioned elements in other developing countries is valuable for TQM adoption in a global context. Furthermore, researchers may build on the quantitative findings of this study to undertake additional research utilising case studies, which would reveal more valuable workable implications for industrial organisations implementing TQM. Lastly, based on the findings discussed in this study, comparable investigations may implement and construct a framework for efficient TQM implementation. Data Availability Statement: All data, models, and code generated or used during the study appear in the submitted article.