Seriously, if you're working on $YADDA_YADDA, then obviously there should be some justification for it, either to yourself or your manager. That's what you need to get down, stuff like: improved response times by x%, killed y open bugs, removed z lines of code, whatever your project's current major issues are.
And if you can't come up with an easy justification like that, why are you doing it? :)
Seriously, if you're working on $YADDA_YADDA, then obviously there should be some justification for it, either to yourself or your manager. That's what you need to get down, stuff like: improved response times by x%, killed y open bugs, removed z lines of code, whatever your project's current major issues are.
And if you can't come up with an easy justification like that, why are you doing it? :)