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Value-based Q(s,S) policy for joint replenishments

Research output: Contribution to conferencePaperResearch

  • CORAL - Centre for Operations Research Applications in Logistics
  • Department of Business Studies
We improve the previously proposed Q(s, S) policy for the stochastic joint replenishment problem. In our value-based Q(s, S) policy, item inventories are reviewed after each demand instant when the total demand since the last replenishment is close to Q. At each such review instance a new replenishment order is issued, if the expected cost of ordering immediately according to the (s, S) policy is less than the expected cost of deferring the order until the next demand or until the level Q is reached.

We use simulation to evaluate our policy. Applying the value-based Q(s, S) policy to a standard set of 12-item numerical examples from the literature, the long-run average cost of the best known solution is reduced by approximately 1%. Further examples are also investigated and in some cases for which the cost structure implies a high service level, the cost reduction exceeds 10% of the cost of the pure Q(s, S) policy.

Original languageEnglish
Publication year2010
Publication statusPublished - 2010
EventLCCC Theme Semester 2010 Workshop on Distributed Model Predictive Control and Supply Chains - Lund, Sweden
Duration: 19 May 201021 May 2010

Conference

ConferenceLCCC Theme Semester 2010 Workshop on Distributed Model Predictive Control and Supply Chains
CountrySweden
CityLund
Period19/05/201021/05/2010

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