In designing a supply chain, firms are often faced with the competing demands of improved customer service and reduced cost. We develop a model that incorporates fixed distribution center location costs, working and safety stock inventory costs at the distribution centers, fixed and variable transport costs from a plant to the distribution centers and delivery costs to customers. Service is mea...

The success of the Internet retailer Amazon.com depends on its providing high-quality customer service. Amazon.com’s customer service operations consist of internally and externally managed contact centers. Amazon.com must size its contact centers appropriately, deciding about hiring and training at internally managed centers, and the volume of voice calls and e-mail messages to allocate to ext...

background: chemical exposure is a major health problem globally. poison control centers (pccs) play a leading role both in developed and developing countries in the prevention and control of poisonous chemical exposures. in this study, we aimed to assess the current state of pccs in pakistan and highlight capacity building needs in these centers. methods: a cross-sectional survey of the two re...

the aim of this research was to investigate the location and accessibility of urmia sport centers concerning national and international standards. the research was applicable, analytical and descriptive. statistical population consisted of all sport centers of urmia physical education department. statistical sample equaled the statistical population (29 sport centers). data were collected by a ...