Defective Galton–Watson processes

Optimal lot sizing in screening processes with returnable defective items

This paper is an extension of Hsu and Hsu (Int J Ind Eng Comput 3(5):939–948, 2012) aiming to determine the optimal order quantity of product batches that contain defective items with percentage nonconforming following a known probability density function. The orders are subject to 100 % screening process at a rate higher than the demand rate. Shortage is backordered, and defective items...

Optimal tool replacement for processes with low fraction defective

Tool wear is a frequent and natural part in many machining processes and is a systematic assignable cause. The fraction of defectives would rise as the tool deteriorates. When the fraction defective reaches a certain level, the tool must be replaced. To minimize the defective parts and the overall tool costs, the optimal tool replacement time needs to be determined. Process capability indices (...

Imperfect and defective outputs in production process

An Integrated Inventory Model with Controllable Lead time and Setup Cost Reduction for Defective and Non-Defective Items

In this paper, the study deals with the lead time and setup reduction problem in the vendor-purchaser integrated inventory model. The cost of capital (i.e., opportunity cost) is one of the key factors in making the inventory and investment decisions. Lead time is an important element in any inventory system. The proposed model is presents an integrated inventory model with controllable lead tim...

Chromosome instability mutants of Saccharomyces cerevisiae that are defective in microtubule-mediated processes.

By using a multiply marked supernumerary chromosome III as an indicator, we isolated mutants of Saccharomyces cerevisiae that display increased rates of chromosome loss. In addition to mutations in the tubulin-encoding TUB genes, we found mutations in the CIN1, CIN2, and CIN4 genes. These genes have been defined independently by mutations causing benomyl supersensitivity and are distinct from o...