A Polyhedral Study of Multiechelon Lot Sizing with Intermediate Demands

@article{Zhang2012APS,
  title={A Polyhedral Study of Multiechelon Lot Sizing with Intermediate Demands},
  author={Minjiao Zhang and Simge K{\"u}ç{\"u}kyavuz and Hande Yaman},
  journal={Operations Research},
  year={2012},
  volume={60},
  pages={918-935}
}
In this paper, we study a multi-echelon uncapacitated lot-sizing problem in series (mULS), where the output of the intermediate echelons has its own external demand, and is also an input to the next echelon. We propose a polynomial-time dynamic programming algorithm, which gives a tight, compact extended formulation for the two echelon case (2-ULS). Next, we present a family of valid inequalities for m-ULS, show its strength and give a polynomial-time separation algorithm. We establish a… CONTINUE READING

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