This paper considers a customer order scheduling (COS) problem in which each customer requests a variety of products processed in a two-machine flow shop. A sequence-independent attached setup for each machine is needed before processing each product lot. We assume that customer orders are satisfied by the job-based processing approach in which the same products from different customer orders f...

in this paper, we investigate the total variation diminishing property for a class of 2-stage explicit rung-kutta methods of order two (rk2) when applied to the numerical solution of special nonlinear initial value problems (ivps) for (odes). schemes preserving the essential physical property of diminishing total variation are of great importance in practice. such schemes are free of spurious o...

The use of product lines is recognized as beneficial in promoting and structuring both component and architecture reuse throughout an organization. While the business practices of using product lines are well-understood and representations for specifying and capturing the underlying architecture of a product line are coming of age, support environments for managing the evolution of a product li...

the rapid growth of population in the third world countries specially in recent decades has posed an important social problem. there have been some attempts to propose solutions for this problem by scientists from various disciplines. however, it seems that an integrated approach calling for collaboration of various efforts can be more fruitful. in this work, we study the relation of women fert...

Process capability of a process is defined as inherent variability of a process which is running under chance cause of variation only. Process capability index is measuring the ability of a process to meet the product specification limit. Generally process capability is measured by 6 assuming that the product characteristic follows Normal distribution. In many practical situations the product ...

By studying a unique data set from a motor vehicle manufacturer, we find that carryover parts, common parts used in successive generations of multi-generational products, are a major source of quality problems, contrary to conventional wisdom. Moreover, the failure rate of carryover parts grows from one generation to the next, a phenomenon known as the carryover spike. Motivated by these result...

A theoretical and experimental study of the effects of variable fiber properties on countercurrent hollow fiber gas separation module performance is presented. Variations in ID, slow gas permeance, and selectivity are considered. Variability in any of these properties is detrimental to performance. The drop in performance increases as either property variation or product purity increase, but pe...