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32 - 32 Interactive Models for Operations and Supply Chain...

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Unformatted text preview: 32 Interactive Models for Operations and Supply Chain Management 3. Set the variables back to the startup default values. Record the total cost for each plan. a. The demand provided is a forecast and we know that forecasts are often wrong. What effect on the two plans would occur if the demand for each month was actually 10 percent above the forecast demand. Why was the impact greater for one plan than for the other? b. Can you create a scenario in which a change in expected demand causes the financial attractiveness of the two plans to reverse? "’ ' ' ‘ ~/W_..”m3<3 : 7 Quality Management Models in This Unit: The X—bar and R-chart Model Unit 4 consists of one model, the X-bar and R-chart Model. The X-bar and R—chart model is designed to explore the interaction between X—bar charts, R-charts, and process capability. As variability among the products in the sample changes, the relationship between the control limits and the specification limits change, as does the range of the sample. Process capability is defined by the rela- tionship between the control limits and specification limits. For centered processes, Cp is used as the capability index. For noncentered processes, Cpk is used. 33 ...
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