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Several studies have reported about sustainability issues of the National Health Insurance Fund (NHIF) due to a mismatch between assets and liabilities. Despite these studies, no study has worked on the asset and liabili...

We introduce the use of a global, nonlinear price function in linear programming and the simplex method. The usual, linear price function of this method captures the objective's behaviour over the cone of directions defi...

The genetic algorithm (GA) is a widely recognized optimization technique for addressing complex and NP-hard problems; however, its effectiveness is often hampered by issues such as premature convergence and population di...

We consider the problem of optimizing rolling stock operations, including preventive maintenance, to enhance technical availability. Our approach accounts for various types of rolling stock and their multi-level maintena...

The Markowitz mean return -- standard deviation portfolio selection model refers to single-period investing. A common practice is using this model for multi-period investing with portfolio rebalancing at specified times....