Poorly structured design and programming during application development phase increases the complexity and risk involved in in the maintenance phase.
How to make this phase efficient?
1) Clear vision on what requirement could be implemented, making sure that you does not break the existing functionality.
2) Analyze the change request both functionally as well as technical (create impact analysis document if required).
3) Identify the change type in term of Visual, Logical, and Database before starting development.
4) Reserve some time to analyze the IN-OUT of the box(code) which might be out of your development scope.
5) Maintain the team member for long tenure, since they know the code very well with in course of time devoted on it.
More important assure your client that you are there for maintaining there services at higher level not only the software codes.
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