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 common consideration on economic model is that there is knowledge about the risk of occurrence of an assignable cause and the various cost parameters that does not always adequately describe what happens in practice. Hence, there is a need for more realistic assumptions to be incorporated. In order to reduce cost penalties for not knowing the true values of some parameters, this paper aims ...

In this article we emphasize the manner in which this statistical indicator the variation coefficient (v) could help the inference on measurable characteristics generated by technological processes. Our interest lies upon the so-called SPCStatistical Process Control; the main result obtained is the following: if the coefficient of variation is known, then the statistical distribution of capabil...

The Analytic Hierarchy Process (AHP) is a useful method in aggregating group preference. We suggest a new method that uses consistency ratio as group evaluation quality. For this method, we introduce Taguchi's loss function. We also develop an evaluation reliability function to derive group weight. Lastly, we perform four experiments in order to confirm validity of this method. 1. Introduction ...

The process of material cutting and fracture by high velocity water jets is a complex series of phenomena which may involve compression, tension, shear, erosion, wears, cracking, wave propagation, and cavitations damage. This makes the exact analysis of the jet cutting process to be very complicated. The problem of water jet coal cutting is a multiresponse problem. There are two output variable...