Document Type

Closed Project

Publication Date

Fall 2010


Timothy Anderson

Course Title

Operations Research in Engineering and Technology

Course Number

ETM 540/640


Operations research, Product life cycle -- Operating systems -- Mathematical models, Manufacturing resource planning -- Decision making


The OEM version of Microsoft Windows XP has reached its end of life in September 2010. For companies using Windows XP in their products, this end of life of the computer operating system has forced them to place a final order of computers with Windows XP. Such final order is used either to support services or to keep production until new products are released to support the new Windows 7 operating system. With unknown demands and uncertainty of new product release date, companies will need to place the final order with optimal quantity to a) prevent halt of shipping, and b) keep the inventory and possible scrap cost at minimum. Using Excel and Oracle Crystal Ball package, based on historic data, this study creates a model that uses simulation technique to generate an optimal final order quantity once the time horizon is given. A moving window, or master schedule, with continuous inventory monitoring, is also developed for decision managers.


This project is only available to students, staff, and faculty of Portland State University

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