Date of Award
Doctor of Philosophy
Industrial and Manufacturing Systems Engineering
This study presents a methodology for calculating the time-dependent availability of flexible manufacturing systems subject to independent exponential components failure. The advantages of failure mode analysis, as presented in this study, are that all potential failure modes are exposed, their associated probability of occurrence are determined and their effect on system performance is evaluated;Three Markovian models are developed considering failure modes. The first model considers a system with one or more flexible machining cells. The second model considers a system with one group of parallel machining cells. The third model considers a typical flexible manufacturing system linked with a material handling system to form a combined network. Application of this model to an existing flexible manufacturing system is analyzed in detail. The performance measures of the three models are determined;A computer program is developed to evaluate the system availability, production rate, component utilization and system effectiveness. The effect of failure modes on system availability is investigated and sensitivity analysis on different performance measures is conducted. Illustrative examples and typical recommendations are also presented and methods of enhancing the performance modeling capability of flexible manufacturing systems are discussed.
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/
George Hanna Abdou
Abdou, George Hanna, "Availability analysis of flexible manufacturing system " (1987). Retrospective Theses and Dissertations. 8504.