New PDF release: Analysis and Algorithms for Service Parts Supply Chains

By John A. Muckstadt

ISBN-10: 0387227156

ISBN-13: 9780387227153

Companies requiring components has develop into a $1.5 trillion company every year world wide, making a great incentive to regulate the logistics of those components successfully via making making plans and operational judgements in a rational and rigorous demeanour. This booklet offers a vast assessment of modeling methods and resolution methodologies for addressing provider elements stock difficulties present in high-powered know-how and aerospace functions. the point of interest during this paintings is at the administration of excessive fee, low call for fee carrier components present in multi-echelon settings.This particular ebook, with its breadth of subject matters and mathematical remedy, starts by means of first demonstrating the optimality of an order-up-to coverage [or (s-1,s)] in definite environments. This coverage is utilized in the genuine global and studied during the textual content. the elemental mathematical construction blocks for modeling and fixing functions of stochastic strategy and optimization concepts to carrier components administration difficulties are summarized widely. a variety of distinctive and approximate mathematical types of multi-echelon platforms is constructed and utilized in perform to estimate destiny stock funding and half fix requirements.The textual content can be used in a number of classes for first-year graduate scholars or senior undergraduates, in addition to for practitioners, requiring just a historical past in stochastic tactics and optimization. it is going to function an outstanding reference for key mathematical ideas and a advisor to modeling numerous multi-echelon provider elements making plans and operational difficulties.

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Additional resources for Analysis and Algorithms for Service Parts Supply Chains

Sample text

While we can extend the ideas to cases with arbitrary demand distributions, we limit the discussion to this case to simplify notation and technical details. Demand is also independent from period to period. We assume the system operates as follows. At the beginning of each period, inventory arrives that was ordered τ periods previously. An order is then placed, if required. At the end of the period, demand occurs, and period costs are charged. We assume there are three types of costs: ordering, holding and backorder costs.

Echelon stock at installation j (2 ≤ j ≤ M) is defined to be inventory on hand at installation j plus inventory in transit to installation j plus echelon stock for installation j − 1; echelon stock at installation 1 is defined as the inventory position at installation 1. Thus echelon j stock is the total inventory on hand plus on-order at installation j plus all inventory downstream of j less any backorders at installation 1. We note that linear purchase and shipping costs can be assumed to be zero under very general assumptions, as shown by Janakiraman and Muckstadt [139].

We prove that when the same “critical distance” policy is used to manage each subsystem, the system follows a basestock policy. 1 Decomposition of the System into Subsystems Let us first outline the proof technique. First, we observe that the cost of the system is the sum of the costs incurred for each unit-customer pair. Second, we show that each of these pairs can be controlled independently and optimally and that the resulting policy is optimal for the entire system. Third, we examine the individual unit-customer problem and show that the optimal policy is a “critical distance” policy: Release a unit if and only if the corresponding customer is closer than a critical distance.

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Analysis and Algorithms for Service Parts Supply Chains by John A. Muckstadt

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