Efficiency in in-plant milk-run systems—The influence of routing strategies on system utilization and process stability

Staab, Tobias; Klenk, Eva; Galka, Stefan; Günthner, Willibald A.

doi:10.1057/jos.2015.6

Cited by 12 publications

(6 citation statements)

References 5 publications

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“…In milkrun planning, a number of objective functions can be formulated. In terms of objective functions, the literature provides a number of options, among which we would like to highlight the followings: cost reduction [24], increasing utilization and process stability [25], reducing physical work [26], reducing errors [27], meeting ergonomic requirements, increasing sustainability. In addition to objective functions, the correct choice and formulation of the constraints is important in optimization.…”

Section: Literature Reviewmentioning

confidence: 99%

A New Design Approach for Milkrun-Based In-Plant Supply in Manufacturing Systems

Bányai¹,

Francuz²

2022

Journal of Machine Engineering

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In manufacturing technologies milkrun and water-spider-based material handling represents up-to-date solutions, especially in the case of just-in-time and just-in-sequence in-plant supply. The objective of this research work is to show how to support the design of milkrun-based in-plant supply with heuristic optimisation in manufacturing processes. This paper proposes a new optimisation approach that can determine the optimal parameters of material handling operations of manufacturing technologies focusing on milkrun-based in-plant supply of manufacturing and assembly cells and lines. After a careful systematic literature review, this paper introduces a structural model to formulate the problem of routing of milkrun trolleys in manufacturing and assembly processes. Next, a potential mathematical model is described. Numerical results demonstrate how the proposed approach supports the decision making process in milkrun design focusing on the optimisation of the required number of milkrun trolleys and the routing of them.

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Section: Literature Reviewmentioning

confidence: 99%

A New Design Approach for Milkrun-Based In-Plant Supply in Manufacturing Systems

Bányai¹,

Francuz²

2022

Journal of Machine Engineering

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“…Patel et al [2014] reviewed the most efficient methods to solve the problem of milk run material supply system in vehicle routing problem with simultaneous pickup and delivery. Staab et al [2016] presented a generic model to simulate different milk-run systems, focusing on the physical handling steps. In addition, there are very few studies on the combination of milk-run and P-LANE.…”

Section: Literature Reviewmentioning

confidence: 99%

Milk-run routing problem with progress-lane in the collection of automobile parts

et al. 2019

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In recent years, the automotive industry has faced an unprecedented crisis. In particular, the zero-inventory approach, which has been widely pursued by many automobile companies, seems to be impractical in some real production contexts since it requires an inventory of all parts but in low amounts. In this paper, we investigate a new logistics method which collects automobile parts by integrating the progress-lane (P-LANE) into the corresponding vehicle routing problem. We propose a mixed integer programming formulation for this new model, which can simultaneously determines the trip routes to collect automobile parts, as well as the PLANE that each collected part should be assigned to, so as to minimize the total costs of the production and inbound logistics. The comparison with the zero-inventory model shows that the use of the PLANE within the milk-run system could significantly decrease the total costs and also improve the transportation efficiency. To be specific, for small and large size instances, the total costs of the zero-inventory model are about 10% and 30% higher than the ones with PLANE , respectively, which suggests that the periodic part collection model with PLANE could be more appropriate for automobile manufacturing.

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“…The literature on milkrun systems for internal logistics can be categorized into papers that study system performance using simulation methods, and the ones that use analytical models. The most applied method to study a milkrun in a manufacturing setting is simulation, e.g., Hanson and Finnsgård (2014), Korytkowski and Karkoszka (2016) and Staab et al (2016). These papers generally conclude that a milkrun leads to increased smoothness in the material flows.…”

Section: Literature Reviewmentioning

confidence: 99%

Optimizing product allocation in a polling-based milkrun picking system

2019

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E-commerce fulfillment competition evolves around cheap, speedy, and time-definite delivery. Milkrun order picking systems have proven to be very successful in providing handling speed for a large, but highly variable, number of orders. In this system, an order picker picks orders that arrive in real-time during the picking process; by dynamically changing the stops on the picker's current picking route. The advantage of milkrun picking is that it reduces order picking setup time and worker travel time compared with conventional batch picking systems. This article is the first to study order throughput times of multi-line orders in a milkrun picking system. We model this system as a cyclic polling system with simultaneous batch arrivals, and determine the mean order throughput time for three picking strategies: exhaustive, locally-gated, and globally-gated. These results allow us to study the effect of different product allocations in an optimization framework. We show that the picking strategy that achieves the shortest order throughput times depends on the ratio between pick times and travel times. In addition, for a real-world application, we show that milkrun order picking significantly reduces the order throughput time compared with conventional batch picking.

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Efficiency in in-plant milk-run systems—The influence of routing strategies on system utilization and process stability

Cited by 12 publications

References 5 publications

A New Design Approach for Milkrun-Based In-Plant Supply in Manufacturing Systems

A New Design Approach for Milkrun-Based In-Plant Supply in Manufacturing Systems

Milk-run routing problem with progress-lane in the collection of automobile parts

Optimizing product allocation in a polling-based milkrun picking system

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