Recently added articles from IIE Transactions:
Detectability study for statistical monitoring of multivariate dynamic processes.(Technical report)
Jul 01, 2009; ... 1. Introduction Statistical Process Control (SPC) plays a very important role in quality and productivity improvement of a manufacturing or service enterprise (Montgomery, 2005). Following SPC methodology, measurements are taken from the process or the product, they are then ...
Sensor fault detection for manufacturing quality control.(Technical report)
Jul 01, 2009; ... 1. Introduction The extensive adoption of sensor technology in manufacturing processes, for example the use of in-line Coordinate Measuring Machines (CMMs) in automotive body assembly processes, has resulted in extensive databases on product quality characteristics becoming ...
Multiscale mapping of aggregated signal features to embedded time--frequency localized operations using wavelets.
Jul 01, 2009; ... 1. Introduction In general, a complex system consists of multiple embedded operations. Although the separate measurement of individual operation responses can provide explicit diagnostic information for system monitoring, it is often not possible or economic to install ...
Off-line inspections under inspection errors.
Jul 01, 2009; ... 1. Introduction Quality control is fundamental to the production process. A firm that is not wise enough to implement a quality control program will not survive in today's global competitive environment. If a defective unit reaches a customer, the firm's ability to compete is ...
An enhanced adaptive CUSUM control chart.(Formula)
Jul 01, 2009; ... 1. Introduction CUSUM control charts find wide industrial use due to the fact that on-line measurement and distributed computing systems are now extensively used in Statistical Process Control (SPC) applications (Woodall and Montgomery, 1999). CUSUM charts are able to detect ...
Stability analysis of single EWMA controller under dynamic models.(Exponentially Weighted Moving Average)(Technical report)
Jul 01, 2009; ... 1. Introduction Run-to-run (R2R) process control techniques have been extensively studied and are widely utilized in semiconductor manufacturing operations (Sachs et al., 1995; Hamby et al., 1998; Chen and Guo, 2001; Moyne et al., 2001). In particular the model-based ...
Staffing multi-skill call centers via search methods and a performance approximation.(Report)
Jun 01, 2009; ... 1. Introduction Call centers usually handle several types of calls distinguished, for example, by the desired language of communication or the level of skill necessary to deliver technical support. It is usually not possible or cost-effective to train every agent to be able to ...
Computing protection level policies for dynamic capacity allocation problems by using stochastic approximation methods.(Report)
Jun 01, 2009; ... 1. Introduction The problem of allocating limited capacity among competing jobs in a dynamic fashion occurs in many settings. Clinics allocate appointment slots to patients with different needs, production plants allocate production capacity to orders with different priorities, ...
Production control with backlog-dependent demand.(Report)
Jun 01, 2009; ... 1. INTRODUCTION 1.1. Overview This paper describes a model for determining a production policy for a factory that has impatient customers. Customers either obtain their products immediately when they make an order (if there is finished product available) or they are ...
Benefits of cross-training in a skill-based routing contact center with priority queues and impatient customers.(Report)
Jun 01, 2009; ... 1. Introduction Call centers, experiencing a tremendous growth, have become the preferred channel for many organizations to communicate with their customers and provide sales and after-sales services such as tele-marketing, customer service, technical support or other ...
A survey of issues in biomanufacturing research.(Report)
Jun 01, 2009; ... 1. Introduction Biological and healthcare applications will undoubtedly be one of the primary technology development areas of the 21st century. Today, scientists and doctors utilize new advances in biotechnology and biomedical engineering to treat diseases, extend human body ...
Pooling strategies for call center agent cross-training.(Report)
Jun 01, 2009; ... 1. Introduction The proliferation of call and service centers within the rapidly expanding service economy has elevated interest in their efficient design and management. A practice that is well suited to improving call centers is agent cross-training. Cross-training can improve ...
A decomposition approximation for three-machine closed-loop production systems with unreliable machines, finite buffers and a fixed population.(Report)
Jun 01, 2009; ... 1. Introduction 1.1. Closed-loop systems A loop is a material flow system that consists of work centers or machines separated by storage areas (buffers) in which material travels from machine to buffer to machine in a fixed sequence and returns to the first machine ....
A sequential stochastic passenger screening problem for aviation security.(Report)
Jun 01, 2009; ... 1. Introduction The events of September 11, 2001 led to sweeping nation-wide changes in aviation security policy and operations. The piecemeal and reactive nature of many of these changes has resulted in large increases in costs and inconvenience to travelers. The August 2006 ...
Logistics network design with inventory stocking for low-demand parts: modeling and optimization.(Report)
May 01, 2009; ... 1. Introduction Service Parts Logistics (SPL) is increasingly considered to be an indispensable part of supply chain management (Cohen and Lee, 1990; Cohen et al., 1997; Cohen et al., 1999; Cohen, Cull, Lee and Willen, 2000). The term SPL mainly refers to after-market service ...
A method for estimating stock-out-based substitution rates by using point-of-sale data.(Report)
May 01, 2009; ... 1. Introduction Understanding how customers respond when they cannot find the product they are looking for is of paramount importance for both retailers and producers (Rajaram and Tang, 2001; Gruen et al., 2002; Colacchio et al., 2003). When a customer who demands a particular ...
Using composite variable modeling to achieve realism and tractability in production planning: an example from automotive stamping.(Report)
May 01, 2009; ... 1. Introduction In this paper, we develop an approach based on composite variable models and a novel corresponding algorithm to solve challenging problems in production planning. We use the problem of scheduling presslines in an automotive stamping facility as a demonstrative ...
Effective management policies for remnant inventory supply chains.(Report)
May 01, 2009; ... 1. Introduction We consider a supply chain problem that combines elements of several classical optimization problems, including the cutting stock problem, inventory management and distribution. Relatively large pieces, called raws, are manufactured or bought from suppliers and ...
Response time reduction in make-to-order and assemble-to-order supply chain design.(Report)
May 01, 2009; ... 1. Introduction Make-to-Order (MTO) systems are successful business strategies to manage responsive supply chains that are characterized by high product variety, highly variable customer demand and short product life cycles. Because of mass customization and competition on ...
Ensuring feasibility in location problems with stochastic demands and congestion.(Report)
May 01, 2009; ... 1. Introduction The fundamental problem facing emergency system planners can be described as follows. Customers residing at the nodes of a transportation network generate stochastic streams of service calls. These calls are served by mobile servers housed at a number of ...