Publication Date

1998

Document Type

Dissertation/Thesis

First Advisor

Marcellus, Richard L.

Degree Name

M.S. (Master of Science)

Department

Department of Industrial Engineering

LCSH

Quality control--Charts, diagrams, etc.--economic aspects

Abstract

Over the past forty years, many models have been introduced to study the problem of economic design of control charts. However, difficulty in understanding and implementation have prevented their widespread use. This study examines an existing model for the economic design of an X statistical quality control chart to determine if it can be implemented in a manufacturing environment. This involves finding values for the sample size, sample frequency, and control limit width in order to minimize the expected cost per hour for the process. A review of the history of economic design in control charts and model development concludes with the model selection for the thesis. An in-depth examination of the model parameter requirements results in the estimates necessary to successfully implement the model. It also introduces a model modification in the estimation of the model parameter p based on observation for the value of ARL2. The model is tested over several hundred parameter settings and the optimal levels for the parameters’ sample size, sample frequency, and control limit width are found. A sensitivity analysis is conducted to determine how sensitive the expected cost per hour is to changes in the model parameters.

Comments

Includes bibliographical references (pages [75]-78)

Extent

vi, 116 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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