Box–Behnken design (BBD) Hadi-Vencheh model SKU benchmark building material distributors central composite design (CCD) competitive hub location problem crow search customer service level cyber-physical production systems differential evolution algorithm discounted cash flow maximization distribution centers energy flexible job shop problem food systems forecasting genetic algorithm heuristic hospital catering identical parallel machines incomplete networks injection molding intelligent manufacturing systems intermodal transportation inventory management iterated local search algorithm local search method logistic systems maintenance scheduling