The (relative) cost of the customer’s waiting time has long been used as a key parameter in queueing models, but it can be difficult to estimate. Recently, Singhal, Singhal, and Kumar (2019) introduce a new queue characteristic, the value of the customer’s waiting time, which measures how an...

We have developed a measure of the value of the customer’s waiting time that is applicable to all queuing systems. Since the birth of the modern queuing theory over one hundred years ago, this measure is the first addition to the list of the measures of performance of general queues that...

We develop an easy-to-implement programmed method for generating new product ideas from existing products. In this method, whose core is a compatibility matrix, each pair of components or each pair of attributes used in a new design is already part of one or more existing products produced by...