List of Articles planning horizon Open Access Article Abstract Page Full-Text 1 - Design of a Mathematical Model for Production and Delivery Planning in the Supply Chain Systems. M. Aryanejad M. Modiri Open Access Article Abstract Page Full-Text 2 - A production-inventory model with permissible delay incorporating learning effect in random planning horizon using genetic algorithm Mohuya B. Kar Shankar Bera Debasis Das Samarjit Kar