In practices, not only production but inspection processes are often not perfect, thereby generating defects and inspection errors. Previous imperfect-quality inventory studies, however, have mostly focused on developing cost-minimizing models that do not consider imperfect inspection processes and related defect sales return issues despite their practical significance. Thus, this study propose...

We consider a set of items that must be produced in lots in a capacitated production system. Two types of failures are considered. At the occurrence of Type I failure, the system shifts to an out-of-control state where it produces a fraction of nonconforming items. After a shift, the system is restored to its initial in-control state. With Type II failures, the system stops and it is minimally ...

The classical economic order quantity model is extended to the case where items may be acquired from various suppliers. It assumed that any lot size received a supplier contains perfect and imperfect quality items. percentage of in random variable having known probability distribution. are detected through 100% screening process conducted at start inventory cycle. When concluded, sold one batch...

In the business world, it is generally observed that supplier gives cash discount due to advance payment. The buyer may either pay off total purchase cost or a fraction of before receiving products. If makes full payment then he receives instantly. pays cost, (s)he while paying remaining amount at time lot. Moreover, in most inventory models, assumed delivered lot contains only perfect items. B...