Integration of Sustainable Criteria in the Development of a Proposal for an Online Postgraduate Program in the Projects Area

: Regulatory dispersion and a utilitarian use of sustainability deepen the gap within the teaching–learning process and limit the introduction of sustainable criteria in organizations through projects. The objective of this research consisted in developing a sustainable and holistic educational proposal for an online postgraduate program belonging to the Universidad Europea del Atlántico (UNEATLANTICO) within the field of projects. The proposal was based on the instrumentalization of a model comprised of national and international bibliographic references, resulting in a sustain ‐ ability guide with significant improvements in relation to the reference standard par excellence: ISO 26000:2010. This guide formed the basis of a sustainability management plan, which was key in the project methodology and during the development of sustainable objectives and descriptors for each of the subjects. Lastly, the entities, attributes, and cardinal relationships were established for the development of a physical model used to facilitate the management of all this information within a SQL database. The rigor when determining the educational program, as well as the subsequent analysis of results as supported by the literature review, presupposes the application of this meth ‐


The Sustainability Paradigm Shift
From the point of view of responsible management, different governmental and nongovernmental organizations and entities have issued sets of codes of ethics and conduct, management system standards, social responsibility reports, and criteria over the last few years to integrate responsibility within investment decisions designed to achieve corporate sustainability.
In this sense, the concept of the here and now of corporate social responsibility (CSR) has been overtaken by theories of sustainability, the principles of which attempt to break away from philanthropic stereotypes [1] traditionally identified with CSR and perpetuate themselves over time [2].
However, sustainability models are generally either made up of variables with a high degree of abstraction or, erroneously, directly by indicators.These are non-holistic models, without a defined instrumentalization [3], and which, in general, do not propose a paradigm shift within the organization [4].They also do not take into account the environmental impact of the product and/or service, while also lacking measurement criteria.This gap can be seen, for example, in the work of Hernández and Sánchez [5] and Lozano et al. [6], who propose the application of the "triple bottom line" (TBL) theory, aimed at enterprising.These studies establish a model based only on national benchmarks to analyze how sustainability influences business performance, considering only the three traditional dimensions: economic, social, and environmental.
The lack of unanimity when defining and measuring the guiding principles of CSR and sustainability makes it very difficult to integrate them with the idiosyncrasies of the organization and, consequently, gain a competitive advantage in the market.
Despite this, the International Organization of Standardization (ISO) published the ISO 26000:2010 standard "Guidelines on Social Responsibility" in 2010 [7].The objective of this guide was to blend all the standards, guides, and models on ethics and social responsibility, focusing on the integration of certifiable standards in quality, environment, and occupational risk prevention, among others, that would enable the optimization of resources and the satisfaction of the current and future needs of all stakeholders related to the organization.The fundamental principles of the ISO 26000:2010 Guidance Standard are shown in Table 1.
As a result of the bibliographic review, a sustainability guide was obtained based on national and international references that offered broader perspectives and more complete results in relation to ISO 26000:2010.

Sustainability in University Programs
The incorporation of sustainability criteria in university programs, and the role that universities should play as generators of knowledge, was already explicitly stated decades ago in the declarations of Stockholm 1972, Rio de Janeiro 1992, Johannesburg Summit 2002, Rio +20 2012 and, more recently, in the United Nations 2030 agenda with the incorporation of the 17 Sustainable Development Goals (SDGs, 2015).
Indeed, empowering students with the necessary skills to develop sustainable solutions by introducing the SDGs in study plans is a good way for universities to contribute toward the 2030 agenda [8].
However, despite all these initiatives and the increase in sustainability content in the classroom, current environmental, social, and ecological problems indicate that not enough progress has been made [9][10][11].
In effect, contributions by universities in this context have been mostly limited to environmental management as reflected in the Green Metrics ranking developed by the University of Indonesia [12]; to offering electives for specific students [13]; to incorporating one or more subjects on sustainable development within the traditional curriculum of a program; or to quantifying the number of publications and courses on sustainable development without delving deeper into teaching-learning processes [9].
Introducing sustainable criteria in the methodology, objectives, and descriptors of all the program subjects-mandatory and elective-implies considerable structural changes in curricular processes, virtual environments, and the community actions of the institution [14].It is because of this complexity that universities are reluctant in readapting their processes, most likely due to the lack of resources and personnel with specific training in this field [15].
A significant example is provided by the Edgewood Business School, where its administration in 2013 rethought introducing sustainability from the outset in the students' main portfolio.In spite of the benefits of a restructuring for students broadening their decision-making scope, opinions were divided among professors, most likely due to lack of training in this area [13].
Despite all this, according to [13], there are some successful experiences in this regard, such as the reorientation of the University of Plymouth (United Kingdom) towards sustainability in 2005 or the MBA postgraduate programs offered by the Saïd Business School of the University of Oxford, also in the United Kingdom.
In conclusion, training people is essential in decreasing the gap between sustainability and training and project management [16]; that is, to overcome the resistance to the paradigm shift and thus influence the strategic objectives of the organization from the project [17,18].

The Importance of e-Learning Education
Regarding the educational field, most of the models found in the bibliography are directed to face-to-face teaching and, to a lesser extent, to the distance modality, with a common practice in the former being the attribution of little relevance to new technologies which, if they appear, usually do so as one more element of the teaching itself instead of assigning it the separate relevance it deserves, as is found in the proposal by Mejías and Martínez [19].
In this sense, virtual education plays a preponderant role in satisfying the right (and the need) that everyone has to access education [20].Between the end of the 20th century and the first decade of 2000, two approaches to virtual education emerged: a partial one, where the educational activity, educational materials, platforms and cost/benefit ratio were evaluated [21][22][23], and a global one, referring to evaluation systems centered on models and/or standards of total quality and on the practice of benchmarking.In this context, according to Pereira and Gelvez [24], as in face-to-face education programs, in the systemic models of quality evaluation in virtual education, there is no clear concept of what quality is, which determines the criteria to be assessed and, thus, why it is important to establish standards for the quality of e-learning.
The Spanish Association for Standardization (UNE) published in 2012 the standard UNE 66181:2012 "Quality Management.Quality of Virtual Education" [25], which determines the three factors involved in meeting the needs and expectations of students, recognizing education for employability, learning methodology, and accessibility.
The importance of having valid and reliable instruments (such as standards or guidelines) is therefore evident, due to the implications that may arise from their use [26].
Within the scope of this research, the impartation of sustainable criteria is fundamental in developing competencies in graduates and in the framework of the Sustainable Development Goals (SDGs).According to Piza-Flores et al. [27], the sustainability model should be one of the guiding principles to be included transversally (in the different curricula of the educational institution).

Sustainability and Project Management
The transversality is justified within the introduction of sustainable principles in each and every one of the knowledge areas of an online project program and for each of the process groups included by the Project Management Institute (PMI) in its "Project Management Body of Knowledge, PMBOK ®" [28], which together with the standard "ISO 21500:2012, Guidance on project management" [29] are the generic standards of most relevance and acceptability referred to project management/administration/leadership.However, it is only in recent years that sustainability criteria have been incorporated into project management, in a very discreet manner.
In this context, Figure 1 shows five key words related to sustainability models, which appear in the sixth and seventh editions of the PMBOK ® and ISO 21500:2012 standards.It can be seen that there are no significant differences between the two versions of the PMBOK ® and that, in general, there are very few explicit references to these terms in the three standards, especially in ISO 21500:2012.Although a more recent version is in force, this research work will focus on the 13 knowledge areas and five process groups (initiation, planning, execution, monitoring and control, and closure) included in the sixth edition of the Project Management Body of Knowledge Guide (PMBOK ® ).
For the sake of simplicity, only the processes for project integration management, i.e., those related to coordinating tasks, resources, and stakeholders, among others, have been named in Table 2. Additionally, the authors added a new knowledge area to the table relating project sustainability management (shaded), of which the sustainability management plan is a part and which will be discussed below.  .It can be noted that the processes always start with a verb, unlike the knowledge areas.Note that the authors of this research have added a new knowledge area related to "project sustainability management."Adapted [28].
These processes are differentiated throughout the project life cycle, which is immersed in one or more other life cycles corresponding to the products generated by the project or to the business cycles of the organizations (Figure 2).In this regard, each of the project life cycle stages is associated with the process groups of initiation, planning, execution, monitoring and control, and closure, from the PMBOK Guide ® [28].Each of these processes produces one or more outputs from one or more inputs through the use of appropriate project management tools and techniques.The output may be a deliverable or a result that is the end result of the process.
Figure 3 illustrates the components of a process.According to Bravo et al. [30], the use of these processes increases the chances of success of a wide variety of project management standards and the implementation of programs complementary to the PMBOK Guide, which contribute toward the coordination of resources and improve managing an organization's elements, such as "The Standard for Program Management" [31] and "The Standard for Portfolio Management" [32].
Lastly, it was essential to incorporate a work methodology that integrated the teaching of abstract concepts through a sustainability model, with the praxis of a project and the virtual dimension of a collaborative environment, such that new knowledge was generated that represented a framework of opportunities, not only for the university to transform itself favorably in the educational sector, but also to expand specific services on its present and future projects, in this case, the academic programs [33].

Research Design
As mentioned in the abstract, the objective of this research work was to introduce sustainable criteria in a postgraduate educational program in online projects at the Universidad Europea del Atlántico from a holistic perspective, i.e., involving both the development phase of the subjects in time, scope, and cost, as well as the teaching-learning process.
The difficulties encountered by the institutions in carrying out this purpose, often related to lack of resources and staff experience, have been discussed in the theoretical framework.
Thus, once the objective and the problem were established, the research question was as follows: Is it possible to develop a holistic model capable of developing the individual capabilities of project managers by incorporating sustainable criteria in its methodology and in the results of the teaching-learning process of the online Master's in Projects educational program?
In reference to the research sub-questions:  Is it possible to bridge the gap between sustainability and project methodology?What about sustainability and training at the project level? How can utilitarianism be avoided when applying sustainability criteria to an online graduate program within the project environment? Is it possible to represent the sustainable traceability of the subject through a sustainability management plan? How can new technologies facilitate the current paradigm shift that sustainability represents?

Materials and Methods
The methodology followed in this research was exploratory and descriptive based on triangulation; that is, information from different sources was contrasted [34].It also had a qualitative, non-experimental, cross-sectional approach, since no hypotheses were proposed and no variables were manipulated, but "[...] data was measured, evaluated or collected on various aspects, dimensions or components of the phenomenon to be researched [in its natural working environment and at a single time]" [35,36].
A relevant aspect of the research was the development of a sustainability management plan for each of the subjects, supported by a sustainability guideline, improved in relation to the ISO 26000:2010 reference standard.
The sustainability guideline was prepared based on management models, guides, and tools and, more importantly, on conceptual definitions of the variables or areas of knowledge of sustainability stemming from the review of the bibliography by means of expert judgment and other documented information.
Table 3 shows the variables or areas of knowledge used in this research and their associated bibliographic sources.In its methodological stage, the sustainability management plan facilitated the implementation of sustainability criteria in the process groups (initiation, planning, execution, monitoring, and closure) included in the Project Management Institute's (PMI) "Project Management Body of Knowledge, PMBOK ® " Guide [28].In this sense, it helped to minimize the utilitarian conception that prevails in most project standards and norms, which represents a problem for sustainability durability once the project has been implemented [49].
Lastly, Microsoft SQL Server Manager Studio v.18.12.1 was used for the implementation in SQL code of a physical database model for sustainability, consisting of five entities (professors, students, courses, subjects, and a virtual classroom), with their corresponding attributes and cardinal relationships, which was essential in speeding up the implementation of the teaching-learning process of the master's degree in projects at the institution.

Materials and Subjects
The subjects of the master's degree in projects from the Universidad Europea del Atlántico were grouped into different materials, as shown in Table 4.

Sustainability Management Plan
Figure 4 illustrates the methodology used to develop the subjects of the online master's degree in projects and how they fit within the processes included in the Project Management Body of Knowledge Guide (PMBOK ® ).Participation of the sustainability management plan as another document within the project development management plan has been highlighted in red.

Relational Schema and Physical Database Model for Sustainability
As illustrated in Figure 5, an entity relationship diagram (ERD) was created to illustrate the university's business model in relation to the relationship between the different entities described by means of connecting lines, visualizing attributes and quantifying the relationship between instances (cardinality).In relation to cardinality, it was considered that:  Professors may teach one or more subjects, but a subject can only be taught by one professor (cardinality 1:n).


The program groups one or more subjects; however, a subject can only belong to one program (cardinality 1:n).


The virtual campus has one or more subjects but these can only belong to one virtual campus (cardinality 1:n).


One or several students can take one or several subjects of the program (modularity), just as the same subject can be taken by one or several students (cardinality n:n).This relational structure was converted to a physical model, which served as the basis for developing the code to be implemented in SQL.In this regard, Figure 6 illustrates the physical model with its corresponding relationships, tables, and attributes.

Panel of Experts
The panel of experts for the first three sections consisted of a total of two professors from the university, who teach in the environmental engineering and occupational risk prevention postgraduate programs.
The structure of the sustainability management plan, the allocation of resources and the definition of decision criteria were carried out by three professors from the environmental management graduate program in the projects area.
Lastly, an IT doctoral profile was in charge of creating the sustainability database and the physics model and implementing a code in SQL.

Obtaining Variables, Factors, and Indicators for Sustainability
Table 5 shows an example of the factors associated with the variable "Logistics and responsible operations".It can be seen how the degree of abstraction is decreasing.Logically, an indeterminate number of factors can be identified, depending on the conceptualization of the phenomenon under study.

Variable
Responsible Logistics and Operations Theoretical definition Defined as the set of means and methods necessary to carry out the organization of a company or a service, especially that of distribution.

Conceptual definition
Study, research, management, and development of activities related to the availability of resources to handle the processing of finished products, customer orders, dispatch orders, packing and packaging, handling transporters, deliveries, follow-up, and arrival of conformities [50].Factor Availability of human and material resources.Table 6 shows an example of the indicators associated with the "Gender Equity and Equality" factor.Table 6.Determination of the Indicators of the "Gender Equity and Equality" Factor Based on its Operational Definition.

Conceptual definition
Gender equity is understood as impartial treatment between women and men according to their respective needs, either with equal treatment or with differentiated but considered equivalent treatment in terms of rights, benefits, obligations, and possibilities.Gender equality is understood as a situation in which women and men have the same possibilities, or opportunities in life, to access and control socially valuable resources and assets [51].

Operational definition
Equal distribution of government tasks between men and women and equity in terms of salaries through the implementation of equal opportunity programs.
Indicator Degree of women's participation in government tasks.Demographic, social, and economic characteristics of the worker.

Creation of a Sustainability Guideline
The sustainability guideline was developed following a systemic process approach in all its phases of development, implementation, and effectiveness improvement in its application toward the educational institution, with the aim of increasing stakeholder satisfaction through the fulfillment of its objectives.This guideline offers numerous definitions and concepts that appear in the ISO 26000:2010 standard and other norms and standards of interest, complemented with documented information found as a result of the research, representing added value to expand the detail of some concepts and provide a series of recommendations and aids to facilitate the integration of sustainability in the objectives, descriptors, and methods of the online master's degree in projects.
Table A1 in Appendix A illustrates the structure of the chapters and sections of the guideline.

What's New in the Sustainability Guideline vs. ISO 26000:2010
As can be seen, the references that are not explicitly included in the CSR standard refer to environmental risk, the life cycle of the product and/or service provision, and job analysis, description, and specifications (Table 7).rates, as well as public information education.

Life cycle analysis of products and/or services.
Inclusion of reference to standards such as ISO 14040 [52] to, among other things, measure the environmental impact of the product and/or service.References to the generation of eco-labeled products References to the calculation of the carbon footprint of products and/or services using the PAS 2050 standard [53].
6.4.Labor Practices 6.13.Job analysis, description, and specifications Updated records describing the particularities of every job position, degree of detail, and associated risks (professional profile).Implementation of improvement actions resulting from the evaluation of the results achieved.

Structure of a Sustainability Management Plan
To avoid a utilitarian conception of sustainability, a management plan was drawn up for each of the subjects, reflecting the sustainability criteria corresponding to the methods, objectives, and descriptors.
Thus, the general structure of the sustainability management plan is shown in Table 8.

Program Mission
To provide quality education to meet the educational needs of the people.
2. Program Vision To become a benchmark institution for its teaching methodology based on sustainability.

Program Objective
To train professionals in project practices and disciplines that contribute sustainable value to organizational processes.5. Scope of the Subject Project Comprehensive management of the subject project (incorporation, identification of stakeholders, development of the management plan, execution and control, closure, and termination).Logistical area (author(s) recruitment, student management, procurement management...) Technical-legal area (identification of applicable legislation, identification of risks...) Organizational (organization of human resources, stakeholder awareness, etc.) Performance scope (development of the subject, delivery of the subject, subject evaluation systems, etc.).

Institutional Sustainability Policy
The subject project must be aligned with the sustainability indicators required by the educational institution and in accordance with the base requirements of scope, costs, and schedule.7. Sustainability Objectives of the Subject Identify and assess possible negative impacts of the subject project.Establish preventive and corrective measures to eliminate or minimize the negative impacts of the subject project.

Control changes Conduct student satisfaction surveys
Write sustainability reports Close the subject project 8.5.Closing 9. Roles and Responsibilities Assignment of the project manager and the project yeam Levels of authority 10.Sustainability Tools and Techniques Regulations, cost-benefit analysis, simulations, mapping process, flowcharts, etc.
11. Sustainability Metrics Set of performance indicators for sustainability 3.5.Database Application Table 9 shows an example of the implementation of the code in SQL, based on the physical model in Figure 6, applied to the combination of some attributes of the tables "Materials" and "Subjects".Full Examples of descriptors and objectives for sustainability are shown in Tables A2-A6 in Appendix A.

Discussion
In this research article, a sustainability model composed of a set of variables was developed, to be subsequently instrumentalized in an online postgraduate training program in the field of project management.Despite the terminological confusion and heterogeneity existing among sustainability tools, it confirms the commitment of the university, as a human organization, to incorporate a sustainability code that allows it to maintain its idiosyncrasy and establish identity links with the environment.Indeed, authors such as [54] consider that the environment, and in particular the stakeholders, should play a fundamental role in decision-making.Along the same lines, [55] mentions the importance of maintaining a good reputation under a global and integrating approach in which the organization's responsibility is assumed before society in general.This confirms, therefore, the importance of sustainability models to create and contribute value in the university in relation to the "triple bottom line" and environmental management of the product and/or service, through socially responsible investment, labor practices and human rights, use of environmental protection instruments, life cycle analysis, etc.
The operationalization of the model's variables was the first step in obtaining the sustainability factors and indicators.This step was necessary because, being made up of variables, the degree of abstraction of a model is very high and has no practical application per se unless it is instrumentalized in a management tool.In this context, the operationalization of variables has been studied by several authors such as [56], [57] and [58], but always from the point of view of the "triple bottom line".Other authors, such as [26], justify the importance of having, at least, valid and reliable instruments (such as standards or guidelines).In the same line, [55] refers to the fact that combining all these interests (ethical, environmental, social, economic...) forces organizations to look for tools (based on continuous improvement) that enable the observation, measurement, and manipulation of these variables.Thus, it concludes that the operationalization of variables is necessary in the creation of a new instrument and obtaining the sustainability factors, which will be part of the methods, objectives, and descriptors of the different subjects of the online training program.
By implementing the model in a sustainability guideline, it was possible to create synergies and complementarities with the ISO 26000:2010 Social Responsibility Guideline.This was very useful, because, as a result of the comparison, it was possible to detect gaps and shortcomings between the two instruments.Thus, it was interesting to add a number of new features to the sustainability guideline, including a fourth dimension that takes into account the environmental impact of the product and/or service provision throughout its life cycle.In this regard, it has been found that most sustainability management tools are eminently theoretical, so they do not provide measurement indicators and, when they do, they refer to the Global Reporting Initiative [40].Likewise, there are still shortcomings in most standards, especially with regard to the impossibility of ISO 26000:2010 certification, the absence of a basis of measurement indicators, and the explicit assessment of the impact of the product or service [48].
Far from a utilitarian conception of the term, in this research, the sustainability guideline was used to introduce sustainable criteria in the processes included in the sixth edition of the PMBOK ® project management standard [28].This means that the creation of sustainable value occurs not only in the final product, i.e., in the objectives and descriptors of the subjects, but also in the development methodology of the training program, thus giving the master's in projects a holistic character.In line with the interpretation made by ISO 9001:2015 [45], the PMBOK ® guide [28] was considered as a complement for the implementation of the sustainability guideline, i.e., as a reference framework, which could be implemented using other methodologies and tools compatible with the knowledge areas and the process approach.This is corroborated by [59], who consider that the best way to integrate sustainability or other criteria into a standard is to develop another tool from a model and establish equivalences between them.In the same sense, [60] equates the project management standard with a customizable guide, adapted to any type of scope, industry, or project culture, unlike other authors such as [61], who consider it as a project methodology.In conclusion, it is necessary to create new holistic frameworks that break away from traditional standards and consider metrics at every point in the project life cycle.
In order to summarize all of the above, the sustainability management plan was structured for each of the subjects in the training program.This document is essential for the sustainable planning of the subject, since it contemplates the guidelines for incorporating sustainability criteria throughout its life cycle.In fact, authors such as [62] consider that the planning phase is the one with the greatest potential for sustainability at the lowest cost.Along the same lines, [63] consider such a plan as a planning tool that plays a fundamental role in decision-making and change control in the project.In short, it is a tool that helps to interpret the scope and clarify the work of the subject, containing its attributes and methods as well as procedures for the determination of metrics and control.
Finally, technological tools can help to reduce the gap between sustainability and project management, facilitating integration and creating synergies between the different instruments.In this research, a small code connected to a database was developed, which allows identifying the sustainable criteria that affect each of the subjects.However, as it has been seen, they can be used to develop skills among students by ensuring, in addition to the delivery of knowledge, how to process it through satisfaction assessment tools and application in practice.In the same line, [64] determines the three main factors involved in satisfying students' needs and expectations: recognition of training for employability, learning methodology, and accessibility.

Conclusions
The training itinerary presented in this research responds to a holistic model, enabling the development of individual project managers' skills in sustainability and, consequently, reducing the existing gap between this paradigm, project methodology, and training in this field.
The approach to sustainability taken in this article goes beyond the addition of a label or a subject on good sustainable practices to the traditional student portfolio.The aim is to include ethical, social, environmental, and product responsibilities, both in the methods and in all the subjects of an online educational program, to minimize a project's impacts on the environment.
Regarding the second research sub-question, a sustainability guide was obtained that includes concepts that do not appear in ISO 26000:2010, such as job analysis and specifications, environmental risk, and the life cycle of the product and/or service provision.Unlike traditional standards, the instrument is applied at all stages of the subject life cycle, thus avoiding a utilitarian use, which would limit the durability of sustainability over time.
In this sense, relating to the third and fourth research sub-questions, the sustainability management plan and technology play a very important role in the planning and sustainable traceability of the subjects throughout their life cycle, as they introduce sustainability into the project methodology and facilitate the consultation, modification, and implementation of sustainability criteria, respectively.
In the end, this research will hopefully help, among other issues, to reduce the gap between project management and sustainability, for which it is very important to acquire a holistic vision and develop critical capabilities for the creation of sustainable value in the foundations of project manager thinking.Informed Consent Statement: Informed consent was obtained from all subjects involved in the study.

Data Availability Statement:
The data presented in this study are available on request from the corresponding author.The data are not publicly available due to the conditions of the project contract with the funder (Society for Regional Development of Cantabria).

Table A6
. Sustainable Teaching Objectives of the Subject "Strategic Human Resources Management".

Area: Project Management and Monitoring Subject: Human Resources Strategic Management
Make known … The guiding principles of an ISO 45001 occupational health and safety management system Current occupational health and safety legislation The rights to association, collective bargaining, union action, privacy... Protocols for hazard identification and risk assessment in the workplace Standards for work-life balance management, e.g., EFR 1000 1.2 Job analysis, job descriptions, and job specifications Programs and mechanisms for gender equity and equal opportunities between men and women Explicit policies of non-discrimination on the basis of race, sex, maternity, paternity, beliefs, ideology, sexual orientation, nationality, social origin, age, disabilities, or other distinguishing characteristics Preventive and corrective measures for behaviors that violate the dignity of workers, especially those that fall under the concepts of moral or sexual harassment and/or violence in the workplace Special programs for the hiring of people with disabilities, according to current legislation The guidelines of the ILO conventions in relation to the minimum working age (ILO, art.2, 1) Training plans, through the diagnosis of the organization's needs in this area, monitoring and evaluation of competencies Current legislation on health and accident insurance, unemployment protection, among others, prioritizing stable, permanent local labor contracts over other types of contracts, and avoiding irregular hiring practices Information on the code of ethics and other aspects related to the sustainable management system that have an impact in its areas of responsibility …

Figure 1 .
Figure 1.Posting of five keywords related to sustainability models in the PMBOK ® (sixth and seventh edition) and ISO 21500:2012 project standards.Note: Own elaboration.

Figure 4 .
Figure 4. Planning, execution, and monitoring and control stages of the development of subjects of the online master's degree in projects.Note: The color red highlights the inclusion within the planning stage of the sustainability management plan.Own elaboration.

Figure 5 .
Figure 5. Relational structure with the identities, attributes, and cardinal relationships included in the database.

Figure 6 .
Figure 6.Tables and attributes of the physical database model.Note: The cardinal ratio n:n has been transformed to 1:n by introducing a transitive intermediate table (dotted line).

8 . 4 .
management plan of the subject.Determine subject descriptors Determine the sustainability factors of the subject matter Estimate baselines (time, costs...) Develop the budget for the subject project.Estimate procurement needs 8.3.Execution Incorporate sustainability objectives, descriptors, and factors into the sustainability database.Develop the contents of the subject Teach the subject Evaluate education and delivery Manage communications Monitoring and controlling

Table 1 .
Fundamental principles of the ISO 26000:2010 Guidance Standard.

Table 2 .
Map of Proposed Processes to Integrate the Sustainability Model in the Online Training Program on a Project.Only the most significant processes and knowledge areas of the case study are shown in the table

Table 3 .
Sustainability Model Variables and References Consulted.

Table 4 .
Materials and subjects of the master's program in projects from the Universidad Europea del Atlántico.

Table 5 .
Determination of the "Logistics and Responsible Operations" Variable Factors Based on its Conceptual Definition.

Table 7 .
Innovations in the Sustainability Guideline vs. the ISO 26000:2010 Core Subjects.

Table 8 .
Structure of the Sustainability Management Plan.

Table 9 .
Database structure applied to the tables of Materials and Subjects.