The analytic hierarchy process (AHP) is a structured technique for dealing with complex decisionmaking and is already used to solve many group decision problems. This paper used the CauchySchwarz inequality to improve the AHP algorithm that was developed by Escobar et al. (2004). They provided an upper bound for the group geometric consistency index in order to prove that the group geometric co...

Supply Chain Management is an integrated approach to increase the effectiveness of the logistics chain by improving cooperation between the players in the chain. Supplier selection is one of the most crucial activities performed by organizations because of its strategic importance. Supplier selection is a multi-objective problem involving both quantitative and qualitative criteria the paper pro...

the findings indicate that among the main factors affecting job stress the psycho-social, physical and environmental factors are prior to the other factors. also amongst the psychosocial factors, lack of career promotion opportunities with 0.222 has the most weight and a lack of accountability of the management about the employees' concerns with 0.036 has the least weight; amongst the phys...

Pumping station (PS) designs in water networks basically contemplate technical and economic aspects. Technical aspects could be related to the number of pumps PS operational modes PS. Meanwhile, all costs that intervene a design, such as investment, maintenance costs. In general, network are usually focused on optimizing or investment costs, However, some subjective have not been approached, de...