In common models of project time-cost trade-off, time value of money is not considered and often time-cost trade-off is performed without considering time value of money. In real world, pass of time causes decrease in money value. Therefore, taking into account the time value of money in time-cost trade-off problem makes this problem is becoming more and more realistic. In this paper, we study ...

Loss functions play a fundamental role in every quality engineering method. A new set of loss functions is proposed based on Taguchi’s societal loss concept. Its applications to robust parameter design are discussed in detail. The loss functions are shown to posses some interesting properties and lead to theoretical results that cannot be handled with other loss functions.

To solve the problem of great number of test cases, and to force the configuration testing to be effective, combinatorial testing is proposed, using an Orthogonal Array Testing Strategy (OATS) as a systematic, statistical way of testing pair-wise interactions. This combinatorial approach to software testing uses models to generate a minimal number of test inputs so that selected combinations of...

Abstract The expanding proliferation of components for engineering applications requires greater optimisation parameters, which consequently increases the need more efficient boring practices. Taguchi Pareto-Box Behnken design is an effective procedure process parametric IS 2062 E250 steel plates. However, weakness method in its inability to distinguish parameters have effects on needs be furth...

iran is one of the most energy-rich countries subsidizing energy carriers, especially in the agricultural sector, to the extent that the resulting growth is at the expense of the environment. this study tries to investigate the potential impacts of energy price reform on the agro-environment, based on the marginal abatement costs (macs) of emissions. firstly, the energy demand function of the a...

In order to solve the problem that existing low-carbon vehicle scheduling model ignores economic benefits of enterprises and cannot fully reflect fuzzy needs customers, green simultaneous pick-up delivery is studied here. With goal minimizing total cost composed service cost, fuel consumption carbon emission a multi-objective comprehensive under demand established. consider objective uncertaint...

Article history: Received January 1 2012 Received in revised format April 15 2013 Accepted April 15 2013 Available online April 15 2013 Cutting force and chip reduction coefficient is the important index of machinability as it determines the power consumption and amount of energy invested in machining actions. It is primarily influenced by process parameters like cutting speed, feed and depth o...

The determination of the target for a manufacturing process involves a complex and fiscally vital decision. This study examines a situation where a product is classified into several grades with respect to specifications of markets. It is reasonably assumed that each grade gives its price and manufacturers cannot produce every item in good grade due to uncontrollable variation of product perfor...

The fundamental function of a cellular manufacturing system (CMS) is based on definition and recognition of a type of similarity among parts that should be produced in a planning period. Cell formation (CF) and cell layout design are two important steps in implementation of the CMS. This paper represents a new nonlinear mathematical programming model for dynamic cell formation that employs the ...

In this article, a multi objective model is presented to select and allocate the order to suppliers in uncertainty condition and in a multi source, multi customer and multiproduct case in a multi period state at two levels of supply chain. Objective functions considered in this study as the measures to evaluate suppliers are cost including purchase, transportation and ordering costs, timely del...