Effective ready mixed concrete supply adjustments with inoperative mixers under stochastic travel times

Shangyao Yan, Wei Chung Wang, Gong Wen Chang, Han Chun Lin

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

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.

Original languageEnglish
Pages (from-to)286-300
Number of pages15
JournalTransportation Letters
Volume8
Issue number5
DOIs
StatePublished - 19 Oct 2016

Keywords

  • Network flow
  • Ready mixed concrete
  • Stochastic travel times
  • Truck dispatching

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