This paper presents a multi-objective production planning model for a factory operating under a multi-product, and multi-period environment using the lexicographic (pre-emptive) procedure. The model objectives are to maximize the profit, minimize the total cost, and maximize the Overall Service Level (OSL) of the customers. The system consists of three potential suppliers that serve the factory to serve three customers/distributors. The performance of the developed model is illustrated using a verification example. Discussion of the results proved the efficacy of the model. Also, the effect of the deviation percentages on the different objectives is discussed.

BPS was used as reinforcement fibers in ABS matrix. Banana fibers were pretreated by using Sodium hydroxide solution with 5% concentration for 24 hours in order to enhance the adhesion interface between banana fibers and ABS Matrix. ABS/BPS composites were prepared at 0, 10, 20 and 30 wt% banana fibers. The ultimate tensile strength (UTS) and impact toughness for BPS/ABS composites at 0, 10, 20, 30 % fiber weight percentage were studied. The SEM observation for fracture surfaces was investigated. The thermal stability of the composites is studied using TGA test.