Optimization-Aware Explainable Machine Learning: Algorithms, Metrics and Applications

A special issue of Mathematics (ISSN 2227-7390). This special issue belongs to the section "E1: Mathematics and Computer Science".

Deadline for manuscript submissions: 30 June 2026 | Viewed by 553

Special Issue Editor


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Guest Editor
School of Mathematical and Computational Sciences, University of Prince Edward Island, Charlottetown, PE C1A 4P3, Canada
Interests: machine learning; explainable artificial intelligence; model interpretability; optimization; multi objective optimization; combinatorial optimization; heuristic methods; simulation modeling; linear programming; optimization modeling; AutoML

Special Issue Information

Dear Colleagues,

Machine learning models are increasingly used in complex decision environments where accuracy alone is insufficient. Decision makers need models that not only perform well but also provide explanations that are stable, consistent, and actionable. Too often, interpretability is treated as an afterthought, an evaluation step performed once a model is chosen. This approach can lead to explanations that are fragile, inconsistent, or misaligned with stakeholder needs.

This Special Issue focuses on optimization-aware explainable machine learning, an approach that treats explanation as a first-class objective in the model development process. In this view, interpretability is not simply measured after the fact but is actively optimized alongside predictive accuracy, fairness, and other performance criteria. Optimization awareness means designing algorithms, model selection processes, and evaluation pipelines that explicitly account for explanation quality and stability throughout the entire machine learning workflow.

We invite contributions that advance the theory, methodology, and applications of optimization-aware explainable machine learning. Topics of interest include, but are not limited to, the following:

  • Algorithms that integrate interpretability constraints or objectives directly into training and model selection;
  • Stability-focused interpretability metrics and methods for ensuring explanation robustness under data variation;
  • Multi-objective optimization strategies balancing accuracy, fairness, and interpretability;
  • Evaluation frameworks that embed stakeholder needs into the optimization process;
  • Applications in domains where explanation is critical for adoption, such as agriculture, climate science, healthcare, finance, and engineering;
  • Comparative analyses and benchmarks of optimization-driven explainability methods.

We also welcome interdisciplinary submissions that connect optimization-aware explainable machine learning with trustworthy AI, human-centered AI, and responsible deployment practices.

This Special Issue will showcase research where optimization is not only a means to improve predictive performance but also a foundation for developing models that are truly worth explaining. By bringing together experts in optimization, machine learning, and application-driven research, we seek to establish a body of work that will define the future of transparent, accountable AI.

Dr. Tamayo-Vera Dania
Guest Editor

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Keywords

  • optimization-aware machine learning
  • explainable artificial intelligence
  • model interpretability
  • explanation stability
  • multi-objective optimization
  • model selection strategies
  • trustworthy artificial intelligence
  • interpretability metrics
  • stakeholder-aligned explanations
  • decision support systems

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Published Papers (1 paper)

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Research

29 pages, 2965 KB  
Article
Missingness-Aware TabNet: Handling Structural Missing Data for the Interpretable Prediction of Global Maternal Mortality
by Siyeon Yu, Yeongsin Mun, Gaeun Lee, Yurim Lee, Hyeonwoo Kim and Jihoon Moon
Mathematics 2026, 14(8), 1325; https://doi.org/10.3390/math14081325 - 15 Apr 2026
Viewed by 262
Abstract
Reliable, explainable prediction of the maternal mortality ratio (MMR) is challenging in global health because country-level indicators are heterogeneous and missingness is often informative rather than random. This study aims to develop and validate a missingness-aware TabNet (MA-TabNet), an attention-based framework that treats [...] Read more.
Reliable, explainable prediction of the maternal mortality ratio (MMR) is challenging in global health because country-level indicators are heterogeneous and missingness is often informative rather than random. This study aims to develop and validate a missingness-aware TabNet (MA-TabNet), an attention-based framework that treats absence patterns as learnable signals while maintaining a stable feature space for country-level MMR forecasting and interpretation. We build a country–year panel from a publicly available global nutrition and health dataset and predict MMR using socioeconomic and health indicators to test whether missingness patterns add predictive signal beyond observed covariates. The model applies a distribution-aware selective masking strategy, adding missingness indicators only for variables with high missing rates; remaining gaps are handled by median imputation, with indicators retained to explicitly encode reporting uncertainty. Country codes and regional groupings are encoded as learnable embeddings, and entmax-based sequential attention is used to improve feature selection via sparse, competition-style masks under correlated determinants. Hyperparameters are tuned using Bayesian optimization, and evaluation follows a temporally realistic protocol (train on earlier years; test on a future held-out year). MA-TabNet achieves a mean absolute error (MAE) of 21.05, root mean squared error (RMSE) of 36.24, and R2 of 0.9739, outperforming strong tree-based baselines and improving on the original TabNet while avoiding the training instability observed in some transformer-style tabular models. For transparency, we report attention-derived global and local importance, compare original versus missing-mask features in model importances, and complement these with permutation-based Shapley additive explanation summaries, permutation importance (MAE drop), partial dependence plots for top drivers, and continent-stratified residual analyses to clarify how structural reporting gaps shape predictions and to support trustworthy maternal health monitoring. Overall, these findings suggest that modeling missingness as a measurable reporting signal can yield accurate, auditable forecasts that are better aligned with temporally realistic SDG 3.1 monitoring than “fill-and-forget” preprocessing. Full article
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