Lecture17aa - Lecture 2/27/08 Examples of LP’s 2. Diet...

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Lecture 2/27/08 Examples of LP’s 2. Diet Problem Examples of Bad, Fair, and Excellent Definitions of Decision Variables. Scheduling Problem
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Diet Problem Problem #3, Page 71 in Text Nutrients and Costs per Pound Vitamin A units Vitamin C units Cost Food 1 3 1 $7 Food 2 1 1 $1 Required 12 6
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Definition of Variables Bad Definition – Let x 1 =Food 1 – Let x 2 =Food 2 This is probably clear to the modeler but not to the reader! Fair Definition – Let x 1 =Amount of Food 1 required to meet nutritional requirements. – Let x 2 =Amount of Food 2 required to meet nutritional requirements. Better but definition should include physical units and time element (if any)
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Excellent variable definition – Let x 1 =Amount of Food 1 required (lbs/day) to meet nutritional requirements – Let x 2 =Amount of Food 2 required (lbs/day) to meet nutritional requirements. • Minimize daily cost = $7x
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This note was uploaded on 04/17/2008 for the course CSA 273 taught by Professor Patton during the Spring '08 term at Miami University.

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Lecture17aa - Lecture 2/27/08 Examples of LP’s 2. Diet...

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