Simulation-based efficiency analysis of an in-plant milk-run operator under disturbances

  • Przemysław Korytkowski
  • Rafał Karkoszka
Open Access


This study examines the efficiency, interactions and impact of a milk-run operator on a typical assembly line. The idea behind the milk-run lies in organizing the material supply to production areas using a specialized logistic worker travelling in cycles between the warehouse and production. A discrete-event simulation model was developed to evaluate the interactions of the milk-run operator and a typical 10 workstation assembly line. We present an analysis of the various kinds of disturbances occurring in the production environment (time variability of technological operations and supply cycle, delays of supply cycles) and management decisions (takt time presence or absence, buffer capacity, supply cycle duration) on the production stability and performance (assembly line throughput rate, milk-run operator utilization, workstation starvation and work in process). Recommendations for designers of in-plant logistics are provided.


Milk-run Simulation Efficiency analysis Throughput rate In-plant logistics 


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© The Author(s) 2015

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  1. 1.Faculty of Computer ScienceWest Pomeranian University of TechnologySzczecinPoland

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