Sharif Digital Repository

Project Scheduling is one of the most important branches of the operational research and management science and scheduling the project activities is considered to be one of the branches of project scheduling issue. Different goals are considered in project scheduling, but financial goals are one of the most necessary criterions in this research area.This study investigates the matter of project procurement scheduling considering incremental discount model and also storehouse space limitation with the aim of minimizing the costs of ordering, maintaining and purchasing materials required for the project.Project procurement scheduling issue, restrictions included, is an NP¬hard issue.... 

Iranian women spend a lot of times in the kitchen area in order to have good effects on the family. Unfortunately, we see many of them are suffering from body injuries and particularly musculoskeletal disorders in their middle ages. Many factors cause such problems among which awkward postures are mentioned and with identifying these postures, corrective solutions could be proposed.In this study, firstly, relationship of body injuries with working in the kitchen area is considered, awkward postures are identified and expedient actions are suggested. The aim of this study is chosen designing a suitable task chair for kitchen among the proposed solutions. Then, chair specifications are...