Thesis Details

Thesis Title: An engineering reliability study of a circular knitting plant
Thesis Author: David Anelundi
Abstract: The essence of reliability is the probability of success. Success is adequate performance. Reliability is the probability of adequate performance. Reliability engineering studies and the use of probability statistics have proven beneficial to the improvement of machinery and process performance. This thesis researches the use of reliability statistics in a circular knitting plant to determine the chronic problem units (CPU), or repeating/frequent failure reasons of circular knitting machines. By analyzing and then calculating the frequency of failures for each machine over a specific time period, reliability values of the knitting machines were determined. Results of the study indicated that reliability data can effectively be used to uncover the chronic problem units hampering a circular knitting plant from achieving high machine reliability values. These reliability data successfully revealed chronic machine failures resulting from yarn quality problems, differing yarn brakes and package geometries.