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This article has been withdrawn as it was published elsewhere and accidentally duplicated. The original article can be seen here: 10.1108/09576069610129874. When citing the article, please cite: Udayan Nandkeolyar, Amrik S. Sohal, Graham Burt, (1996), “Computer-aided design system upgrade process: a case study”, Integrated Manufacturing Systems, Vol. 7 Iss: 5, pp. 60 - 71.

Describes a spreadsheet approach for implementing Wagner‐Whitin (WW) and Silver‐Meal (SM) methods for lotsizing time‐varying demands. Suggests that this approach manages the computation and makes tedious and repetitive tasks more interesting; consequently, the student/user can concentrate on the concepts. Outlines the methods, which involve the computation of incremental costs (inventory carrying and replenishment costs) for several alternatives in each period. Presents a spreadsheet template to compute the incremental costs for possible alternatives which is created by using only a small number of spreadsheet formulae and a series of copy commands. The costs are displayed as a matrix. Describes a step‐by‐step procedure to determine the period and the quantity of replenishment.

Reports on the computer‐aided design (CAD) upgrade implementation process at PBR Automotive Pty Ltd, Melbourne, Australia. Views the implementation as successful since many of the desired outcomes have been achieved or surpassed. The key success factors were detailed planning, user involvement and vendor support. These combined to create an atmosphere of excitement in the project and success. Reports on the future plans that include the development of an integrated information system at PBR which will involve customers and suppliers in addition to internal personnel. The CAD system upgrade serves as a launching board for the development of such a system.