A CASE AGAINST LINEAR PROGRAMMING FOR STOCKPILE PLANNING

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Authors
  1. Taylor, I.
Corporate Authors
Operational Research Div, Ottawa ONT (CAN) Directorate of Operational Research (Joint and Land)
Abstract
The ACROSS model is a linear programming optimization of the stockpile planning system for NATO. As one of the Canadian scientific advisors to J4 Logistics, the author was asked by J4 Logistics Doctrine to provide scientific support on the ACROSS model. After quick introduction to the model, the author conducted sensitivity analysis runs using the example data set. In this process, a serious bug was found in the algorithm. For some reasonable parameter settings, the program stated that the problem was infeasible. Furthermore, the linear programming approach appears to be highly unstable in that small changes to the input can lead to large changes in the output. The program also appeared to make illogical recommendations concerning the stockpile mix. This is caused by an inherent flaw in the linear programming approach; a marginal analysis optimization approach is proposed as an alternative.
Keywords
Linear programming;Stockpile planning;Marginal analysis;Risk analysis;Risk management
Report Number
ORD-DOR(J&L)-RN-9816 — Research Note
Date of publication
01 Jun 1998
Number of Pages
21
DSTKIM No
98-02265
CANDIS No
509134
Format(s):
Hardcopy;Document Image stored on Optical Disk

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