Background: Sulfur compounds must be removed from petroleum because they contribute to environmental pollution. A strong alkaline solution such as caustic soda is used to remove these compounds. This spent caustic has high values for chemical oxygen demand (COD) concentration, pH and total sulfur. In this study, the regeneration and treatment methodology of sulfidic spent caustic was inve...

Supplier selection serves as the most critical factor in supply chain, which involves several criteria. The of right supplier supports company's competition. To support decision-making, a credible and practical decision-making method is thus required. This study aims to integrate Analytic Hierarchy Process (AHP) PROMETHEE II methods for selection. In utilizing this method, AHP utilized determin...

Choosing the proper supplier has a critical role in design of supply chain. This problem is complicated because each supplier may fulfills some of the manufacturer criteria and choosing the best supplier is a Multiple-Criteria Decision Making problem. This paper proposes a novel hybrid approach to rank suppliers in advertising industry and considers two new criteria to evaluate the suppliers in...

strategic selection problem is a multi-criteria problem which includes conflicting tangible and intangible criteria. in order to select the most appropriate strategic alternative it is necessary to make tradeoffs between these criteria as well as taking into account the resource limitations which may exist. available methods neglect the distance concept which exists between the alternatives wei...

Clinical Engineering Department in hospitals need to take decision for Health Care Technology assessment which includes purchase, maintenance, use, and replacement. In this paper we proposed a analytical hierarchy processes -group decision making (AHP-GDM) model to prioritize the medical equipment for replacement. The model structure includes 11 quantitative and qualitative factors descending a...

desertification is one of the major issues threatening human communities. manymethods have been developed for assessment and mapping of desertification hazards. in thisresearch, multi-criteria evaluation method was used to investigate desertification process introuti watershed, golestan province, iran. at the first step, major desertification factors weredetermined by doing field surveys. they ...