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Abdel-Aziz M Mohamed
Arab Academy for Science, Technology and Maritime Transport Department of Supply Chain Management
Decision Sciences, Operations Research & Management Engineering Environmental Science Industrial & Manufacturing Engineering Transportation

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Lead-Time Estimation Approach Using the Process Capability Index Abdel-Aziz M Mohamed
International Journal of Supply Chain Management Vol 4, No 3 (2015): International Journal of Supply Chain Management (IJSCM)
Publisher : International Journal of Supply Chain Management

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Abstract

This research proposes a methodology to estimate the customer order lead-time in supply chain based on the process capability index. The cases when the process output is normally distributed and when it is not are considered. The relationships between the system capability indices in both service and manufacturing applications, delivery system reliabilities and the percentages of orders delivered after their promised due-dates are presented. The proposed method can be used to examine the current process capability to deliver the orders before the promised lead-time. If the system was found to be incapable, the method can be used to help revise the current lead-time to a proper value according to the service reliability level selected by the management. Numerical examples and a case study describing the lead time estimation methodology and testing the system capability of delivering the orders before their promised due date are illustrated.
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