Long time no rant.

Spent the last two days trying to figure out why a legacy app that I adopted (was a surprise considering I'm a database developer not c#).

Long story short horrendous view causing issues retrieving data in an app that is slow enough as it is.

I may have suggested starting a proper product roadmap and using sprint's etc for managing development of said app. And the boss agreed, currently the process is someone asks for a feature and we drop everything and develop it so things get forgotten/pushed to the back of the queue.

So to cut to the chase, can anyone suggest any places I can read up about managing this properly?