Accession Number : AD0679993

Title :   AN INVESTIGATION OF THE EFFECTS OF IDLE TIME COALESCENCE IN A NETWORK OF INDEPENDENT SINGLE SERVICE QUEUES.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : George,Peter Brock

Report Date : SEP 1968

Pagination or Media Count : 138

Abstract : By coalescing the occurrence of idleness due to the absence of work and the nonproductive task of work center preparation, or setup, it may be possible to reduce job flow time and in-process inventory in a job shop. To determine the effects of coalescence, a computer model is formulated that approximates the job shop with a network of ten independent single server queues. The model is simulated at three levels of utilization with three selection rules for coalescence tested within each utilization class. The queue discipline is first-come-first-served for all selection rules. Conclusions are that the effects of coalescence are significant with evidence indicating a reduction in flow time, waiting time, and in-process inventory. (Author)

Descriptors :   (*QUEUEING THEORY, TIME), (*MACHINE SHOP PRACTICE, QUEUEING THEORY), MAINTENANCE, MANUFACTURING, SIMULATION, COMPUTER PROGRAMS, INVENTORY, MATHEMATICAL MODELS, OPTIMIZATION, STATISTICAL ANALYSIS, DISTRIBUTION FUNCTIONS, SCHEDULING, SEQUENCES(MATHEMATICS), THESES

Subject Categories : Operations Research
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE