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3. Al-Sultan, K. S. and M. A. Rahim, “Economic Selection of Process Parameters: A Literature Survey”, Working paper, Department of Systems Engineering, King Fand University of Petroleum and Minerals, 1994.
4. Al-Sultan, K. S. and M. F. S. Pulak, “Process Improvement by Variance Reduction for a Single Filling Operation with Rectifying Inspection”, Accepted for publicaton in Production Planning and Control, 1996.
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