environmental issues have attracted many concerns in recent years. life cycle assessment (lca) is a method that evaluates all environmental effects of a product during its life cycle. the objective of this study was to introduce lca [to persian researchers] and to use it in assessment of environmental impact of wheat production in gorgan, ne iran compared to european counties. first, data were ...

The density function of product life cycles in convenience stores is found to follow the Weibull distribution. To clarify the parameters that determine these life cycles, we introduce the conditional market share—defined as the probability that a product is selected by customers only if it had been previously purchased—and the market share without any conditions. The product life cycle is more ...

Todays efforts to optimize industrial production processes exceedingly focus on tools’ life cycle costs. Toolmaker and its customer are the two entities influencing tools’ life cycle costs. Due to lack of information exchange neither life cycle assessment nor cost efficient life cycles can be realized. An effective lever for penetrating information exchange and therefore gaining cost efficiency...

Concerns about sustainability matters have been growing significantly during the last decades. The triple bottom line approach – an often applied operationalization of sustainability integrating the economic, social, and ecologic aspects of sustainable development – has gained attention in companies, especially with regard to sustainable products. Nevertheless, the integration of sustainability...

Inventory models in which the demand rate dependents on the stock- dependent are based on the common real- life observation that greater product availability tends to stimulate more sales. In this study we develop an inventory model to determine an optimal ordering policy for quantity dependent demand rate and time dependent holding cost items with delay in payments permitted by the supplier un...