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...

In practice the items received in a lot may contain defective items, and the screening process to eliminate the defective items may involve both a Type I and a Type II error. Due to the defective items and the inspection errors, shortages may sometimes occur. In this paper, we develop an economic order quantity model with imperfect quality items, inspection errors, shortage backordering, and sa...

Inventory shrinkage is a common problem in the management of returnable containers. RFID-based container tracking systems have been proposed as a possible solution. Benefits of RFID-based tracking of returnable transport items such as pallets, kegs and boxes are documented in several case studies, but have so far hardly been analyzed from a theoretical perspective. In this article, we analyze t...

The main purpose of this paper is to determine the value of economic order quantity (EOQ) with two types of imperfect items, defective and reworked ones, under 100% inspection. Where defective items are treated as scraps and reworked ones will be sent back to supplier to get repaired. A mathematical model is built on the jo in t d ist ribut ion o f defective and reworked un its which fo llow a ...

Megan Gaffney is Coordinator, Interlibrary Loan and Document Delivery Services, at the University of Delaware Library; e-mail: [email protected]. © Megan Gaffney Several studies have researched the reasons and patterns for academic library users’ interlibrary loan requests for materials already available at their college or university library. This study examines interlibrary loan statistics at...

A buyer can learn her value for a returnable experience good by trying it out, with the option of returning the good for whatever refund the seller o¤ers. Sellers tend to o¤er a “no questions asked” refund for such returns, a money back guarantee. The refund is often too generous, generating ine¢ ciently high levels of returns. We present two versions of a model of a returnable goods market. In...