Farid, F and Koning, T L (1994) Simulation verifies queuing program for selecting loader-truck fleets. Journal of Construction Engineering and Management, 120(2), pp. 386-404. ISSN 0733-9364
Abstract
Proper equipment selection can yield substantial savings in time and cost. MicroCYCLONE simulation package is used to verify the FLEET queuing program. FLEET models multiloader-truck systems using exponential distribution at steady state. A few FLEET assumptions are redefined to closely model real-world construction processes. Graphical solutions illustrate effects of the cycle-time modeling and transient state on multiloader-truck fleet selection. FLEET is shown to be an accurate model of the steady-state, multiloader-truck process if exponential distribution did accurately fit load- and travel-time distributions. But, erlang or beta distribution more closely fits actual load and travel times in construction. Modeling load and travel times of loader-truck fleets with exponential, instead of beta, distribution results in underestimation of production and overestimation of unit cost by 4–7%. Simulation results of a more accurate model that uses beta distribution and considers transient state, in addition to steady state, indicate that multiloader-truck fleets may experience a 4–5% production increase and unit-cost decrease compared to FLEET results.
| Item Type: | Article |
|---|---|
| Index terms: | program, construction process, unit cost, equipment selection, package, savings, modelling |
| Subjects: | software systems, procurement capability, building construction, contractual arrangements, economic analysis, analytical methods, financial and cost management |
| Topics: | Cost Management, Business Strategy, Engineering Principles, Procurement, Digital Applications, Supply Chain Management, Site Management |
| Descriptive scope: | 2 PC |
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