This book constitutes the refereed post-conference proceedings of the 4^th International Conference on Computer Science and Health Engineering in Health Services. Due to COVID-19 pandemic the conference was held virtually.

The 16 full papers presented were carefully reviewed and selected from 39 submissions. The papers highlight the latest research innovations and applications of algorithms designed for optimization applications within the fields of science, computer science, engineering, information technology, economics, and health systems.

New Approaches to Supply Chain Modeling

Classification and clustering of clients of a company dedicated to the distribution of auto parts in the metropolitan area of Monterrey
Guide for sustainable project analysis to improve energy efficiency of Mexican SME
A multi-product stochastic programming model for sup-plier selection in a humanitarian relief chain
Image Classification Applied to the Detection of Leather Defects for Smart Manufacturing Suppliers analysis and selection to improve supply chain performance
Feasibility Analysis of a Supply Chain for Castor Oil Biodiesel Distribution in Central Mexico
Automation of storage and distribution terminals: The case of logistics operators
Health Systems: Strategies for the delimitation of vulnerable areas and identification of failures of medical equipment
Hub location problem for medical care during epidemic outbreaks
Application of Spectral Cluster for the detection of high priority areas of attention for COVID-19 in Mexico
Identifying the Main Causes of Medical Devices Failures while Surgery at High Specialization Hospital implementing Lean Six Sigma
Applied optimization
MTGWA: a multithreaded Gray Wolf algorithm with strategies based on Simulated Annealing and Genetic Algorithms
Effectiveness of some tests of spatial randomness in the detection of weak graphical passwords in Passpoint
Analysis of the number of sides of Voronoi polygons in PassPoint
Modeling Nanocomposites with Ellipsoidal and Conical Inclusions by Optimized Packing
Applications in the education sector
Design strategies for university educational supply chain
Teaching of TCP Fundamental Operations using a Digital<p>Tool.</p>