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Clinical Chemistry 40: 922-928, 1994;
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Clinical Chemistry, Vol 40, 922-928, Copyright © 1994 by American Association for Clinical Chemistry

Realistic modeling of clinical laboratory operation by computer simulation

W Vogt, SL Braun, F Hanssmann, F Liebl, G Berchtold, H Blaschke, M Eckert, GE Hoffmann and S Klose
Institut fur Klinische Chemie und Laboratoriumsmedizin, Deutsches Herzzentrum Munchen des Freistaates Bayern, Germany.

An important objective of laboratory management is to adjust the laboratory's capability to the needs of patients' care as well as economy. The consequences of management may be changes in laboratory organization, equipment, or personnel planning. At present only one's individual experience can be used for making such decisions. We have investigated whether the techniques of operations research could be transferred to a clinical laboratory and whether an adequate simulation model of the laboratory could be realized. First we listed and documented the system design and the process flow for each single laboratory request. These input data were linked by the simulation model (programming language SIMSCRIPT II.5). The output data (turnaround times, utilization rates, and analysis of queue length) were validated by comparison with the current performance data obtained by tracking specimen flow. Congruence of the data was excellent (within +/- 4%). In planning experiments we could study the consequences of changes in order entry, staffing, and equipment on turnaround times, utilization, and queue lengths. We conclude that simulation can be a valuable tool for better management decisions.


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