issue 4 publication date 2015-12-01

• Multiple performance characteristics optimization for Al 7075 on electric discharge drilling by Taguchi grey relational theory
• Identifying the time of a step change in AR(1) auto-correlated simple linear profiles
• Application of queuing theory in production-inventory optimization
• Cost analysis of a coal-fired power plant using the NPV method
• Step change point estimation in the multivariate-attribute process variability using artificial neural networks and maximum likelihood estimation
• An EMQ inventory model for defective products involving rework and sales team’s initiatives-dependent demand
• A two-level discount model for coordinating a decentralized supply chain considering stochastic price-sensitive demand
• Using game theory approach to interpret stable policies for Iran’s oil and gas common resources conflicts with Iraq and Qatar
• A production-inventory model with permissible delay incorporating learning effect in random planning horizon using genetic algorithm
• Development of a QFD-based expert system for CNC turning centre selection
• Risk management in medical product development process using traditional FMEA and fuzzy linguistic approach: a case study