Research Article
Nov 1977
Optimum Working Time
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VIEW THE REPLYPublication: Transportation Engineering Journal of ASCE
Volume 103, Issue 6
Abstract
The familiar problem relating to the tradeoff between direct and indirect cost relative to project duration is solved in closed form. Elementary cost minimizing methods give simple algebraic expressions that optimize constraints. The following rule evolves: The optimum working time for a particular operation is when the total cost for variable overheads (time dependent) equals the total cost to mobilize and demobilize all of the crews. This least-cost solution is not altered by working overtime as a means of reducing equipment requirements. The theoretical solution is illustrated with a solved problem employing the derived formulas as well as by iteration for comparison and sensitivity. The solution to the problem of optimum working time also gives the solution to the problem of the optimum number of crews that should be employed.
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Information
Published In
Transportation Engineering Journal of ASCE
Volume 103 • Issue 6 • November 1977
Pages: 773 - 781
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Nov 1977
Published online: Feb 5, 2021
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Authors
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Marvin Gates, F.ASCE
Pres., Construction Estimating, Inc., West Hartford, Conn., Lect., Worcester Polytechnic Inst., Worcester, Mass.
Amerigo Scarpa, F.ASCE
Pres., Gates-Scarpa and Assocs., Inc., West Hartford, Conn., Lect., Hartford State Technical Coll., Hartford, Conn.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.