software transition issues on O'Reilly.
"In this article, I would like to address some of the difficulties involved in replacing an existing client system with a completely new one. Having gone through this process several times in my career, there are some lessons I have learned that can make this transition easier for the end user. The key is not to take an initial set of requirements at face value, but to work with the future users of the new system (in conjunction with their management) to make sure what's delivered is what's needed.
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