This paper considered newsboy-type products with a normally distributed demand, and defined a product's profitability as the probability of achieving the target profit under optimal ordering condition. In order to determine whether the product is already unworthy of being ordered (or...

Extending Koo and Case's model (1990) for the case of a single assignable cause to allow for the second occurrence of an assignable cause following the first occurrence and the probability of the assignable causes following exponential distribution, the process-failure mechanism having a fixed...