In today's competitive world, the quality of raw material plays a significant role in success organizations. Since materials is factor that leads to reduction return products, selection supplier's problem has always been daunting challenges supply chain. The multi-criteria group decision-making (MCGDM) preferences over criteria, and suppliers are highly dependent on opinions experts. real decis...

Working in hot and humid environments can jeopardize the health safety of workers reduce their efficiency. Different physical, environmental, human factors influence risk level working these atmospheres. Therefore, assessment such atmospheres must be carried out from a holistic point view. This paper aims to introduce novel prioritization model, using hybrid AHP VIKOR methods fuzzy environment....