Start by analysing the current business processes to identify opportunities to simplify, improve, or automate. Decide on what is in scope, wish-list, and out-of-scope.
Ensure all requirements are coded, and they work as intended. Discuss changes, suggestions, enhancements. Get involved in testing. Be part of the project.
Inform changes in advance. Update or create new procedures. Train users. Plan for the cut-off. Manage the go-live. Discuss a post-go-live support plan.