IIE Transactions articles from September 2004

IIE Transactions archives from September 2004

Wavelet-based multiscale statistical process monitoring: a literature review.
September 1, 2004... 1. Introduction Process monitoring refers to the task of detecting abnormal process operating conditions including shifts in the mean and/or the variance of one or more process variables, spikes and drifts. These conditions could occur in...

Variation transmission analysis and diagnosis of multi-operational machining processes.
September 1, 2004... Nomenclature [e.sub.k.sup.f], [e.sub.k.sup.d], [e.sub.k.sup.m] = fixture errors, datum errors, and machine tool errors at operation k; w(k), v(k) = noise terms at operation k; X(k) = a vector to describe part surfaces after...

Inspection schemes for general systems.
September 1, 2004... 1. Introduction Component failures are often observed through inspections as continuous observation may not always be possible. For periodic inspection, the system is tested or inspected after a certain period of time. In general, because...

Integration of dimensional quality and locator reliability in design and evaluation of multi-station body-in-white assembly processes.
September 1, 2004... 1. Introduction An automotive body without doors, hood, fenders and trunk lid is called a "Body-In-White" (BIW). In a BIW assembly line, depending on the complexity of the product, there are typically 80 to 130 assembly stations that...

Cumulative conformance count chart with sequentially updated parameters.
September 1, 2004... 1. Introduction Due to the relentless pursuit of zero defect rates, the high yield control chart, also known as the Cumulative Conformance Count (CCC) chart, has gained considerable attention from industry. This chart, first introduced by...

Extending economic design of p charts to handle user specified constraints using a genetic algorithm.
September 1, 2004... 1. Introduction One method of assessing the quality of the output of a process is Statistical Process Control (SPC). A sample consisting of the last n units produced is taken at intervals of h hours of production. Each sampled unit is...

A likelihood-ratio-based EWMA control chart for monitoring variability of multivariate normal processes.
September 1, 2004... 1. Introduction In recent years, there has been a resurgent interest in multivariate control charts in the statistical and quality literature. Given the voluminous research in various areas of univariate control charts, such a resurgence...

Determining measurement error requirements to satisfy statistical process control performance requirements.
September 1, 2004... 1. Introduction Measurement error (ME) is an integral part of any measurement process, where the values of some response of interest need to be determined through measurement. Thus, any investigation of the root-causes of a quality...

Redundancy allocation for series-parallel systems using a max-min approach.
September 1, 2004... 1. Introduction The redundancy allocation problem has previously been studied considering numerous different problem formulations and solution methodologies. In a new approach, the problem of redundancy allocation has been formulated and...

Online automatic process control using observable noise factors for discrete-part manufacturing.
September 1, 2004... 1. Introduction In manufacturing processes, there are many process variables that interact in a complicated nonlinear fashion. In general, these variables are classified into controllable factors x (variables which can be easily...

Random Processes: Filtering, Estimation, and Detection.(Book Review)
September 1, 2004... Random Processes: Filtering, Estimation, and Detection Lonnie C. Ludeman John Wiley & Sons, New Jersey, 2003, 608 pages, ISBN 0-471-25975-6 Random processes are present in many engineering fields and every day situations....