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Conclusion: Organisations should not use old style systems development methodologies when implementing off-the-shelf packages. Package implementations need to tailor business processes to meet the operational characteristics of the selected package. Old style systems development methodologies assume a green field approach where the objective is to tailor the system to meet exact business requirements.
Heavily tailoring an off-the-shelf package will significantly increase ownership costs (by up to 10 times), while reducing the organisation’s ability to adopt future offerings that have been designed to work with the standard package.
Implementing a new package creates an opportunity to improve the way the organisation operates. Trying to fit a new package into old ways of working is an expensive exercise that invariably fails to take advantage of new business opportunities.
Business professionals must be involved in redesigning / changing business processes. As obvious as this sounds it is not hard to find example after example where it isn’t done.