Effective ready mixed concrete supply adjustments with inoperative mixers under stochastic travel times. Issue 5 (19th October 2016)

• Record Type: Journal Article
• Authors: Yan, Shangyao; Wang, Wei-Chung; Chang, Gong-Wen; Lin, Han-Chun
• Is Part Of: Transportation letters. Volume 8:Issue 5(2016)
• Page Start: 286
• Page End: 300
• Publication Date: 2016-10-19
• Subjects: Ready mixed concrete -- Stochastic travel times -- Truck dispatching -- Network flow; Transportation -- Research -- Periodicals; Transportation -- Periodicals; Urban transportation -- Periodicals; 388.072
• DOI: 10.1080/19427867.2016.1188522
• Languages: English
• ISSNs: 1942-7867

Abstract

Abstract: The purpose of this study is to develop a systematic scheduling model that will help ready mixed concrete (RMC) carriers/suppliers with effective scheduling adjustment after temporary breakdown of mixers under stochastic travel times. The model is formulated as a mixed integer network flow problem with side constraints that is characterized as NP-hard. The authors employ problem decomposition and relaxation techniques, with a mathematical programing solver, to develop an algorithm that is capable of efficiently solving the problem. A simulation-based evaluation method is also proposed to evaluate the model, joined with a deterministic model, as well as the method currently used in actual operations. Finally, a case study is performed using real operating data from a Taiwan RMC firm. The preliminary results demonstrate that the stochastic model and the solution algorithm could be useful to reduce system cost for the RMC carrier in actual operations.