Title :
Cycle Time Approximations for the G/G/m Queue Subject to Server Failures and Cycle Time Offsets with Applications
Author :
Morrison, James R. ; Martin, Donald P.
Author_Institution :
Dept. of Eng. & Technol., Central Michigan Univ., Mount Pleasant, MI
Abstract :
Approximate queueing formulae are often employed for the practical evaluation of manufacturing system performance. Common approximations do not fully address practical issues such as idle tools with work in queue, travel time between stages of production, removal of lots from queue pending process issue resolution and the tendency of lots to defect from a failed server in favor of an equivalent available server. In this paper, approximate queueing formulae are proposed which extend popular existing formulae. To test the quality of the proposed approximations, data from production toolsets in IBM´s 200mm semiconductor manufacturing fabricator is considered. It is demonstrated that the approximations perform well on the toolsets studied
Keywords :
integrated circuit manufacture; manufacturing systems; performance evaluation; queueing theory; 200 mm; G/G/m queue; approximate performance evaluation; approximate queueing; cycle time offsets; hold time; manufacturing system performance; semiconductor manufacturing; server failures; Computer industry; Manufacturing systems; Network servers; Production; Productivity; Queueing analysis; Semiconductor device manufacture; Semiconductor device testing; System performance; Workstations;
Conference_Titel :
Advanced Semiconductor Manufacturing Conference, 2006. ASMC 2006. The 17th Annual SEMI/IEEE
Conference_Location :
Boston, MA
Print_ISBN :
1-4244-0254-9
DOI :
10.1109/ASMC.2006.1638777
