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Title ADAPTIVE CAPABILITY ASSESSMENT OF A PROCESS IN CABLE MANUFACTURING: A CASE STUDY
Journal International journal of Engineering And Applied Science
Publisher Faculty of Engineering, Nnamdi Azikiwe University, Awka Nigeria.
Issue 1
ISSN 1119-8109
Pages 136-143
Subject Industrial & Production Engineering
Date of Publication November 4, 2018

AUTHOR(S) U-DOMINIC .C.M, GODWIN H.C., MGBEMENA .C.E

ABSTRACT

This paper took a conceptual and exploratory direction to discuss the Process Capability (PC) theme. The literal exploration was concisely taken to adequately capture capability index relationships and their rich practical benefits. The case study assessment was undertaken in a cable manufacturing company located in the Southeast Nigeria to solve industry specific problem. The critical-to-quality characteristic considered in this study is Cable uniformity, and the study quest was developed based on the organization’s efforts to maintain process consistency, reduce process loss and improve process yield. The results from the capability assessments before and after the process improvement were used to ascertain the quality level of a specific extruding unit in the case organization. The process stability was steadily maintained in the study through proper identification and careful removal of all the assignable causes of variations in the process. A new engineering tolerance (T±0.032) was derived, and the engineering specification were carefully tightened in such a way that a six sigma process can easily be captured. The quality achievement at the project termination stage depict a peak increment in Sigma level of the process from 0.6 baseline value to 5.2, thus reducing Defects Per Million Opportunities (DPMO) from the 810,000 to 10


Keywords: – Process capability study, box-cox transformation, process capability indices, cable manufacturing




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