People want to know a specific behavior of a system. How often does X happen? What kind of things can trigger Y? Maybe there is documentation, but even if there is nobody trusts it. If folks could just easily and see they would have.
The only solution is to start reading the source code. Perhaps you even wrote it, once upon a time. Nonetheless, all you can do is scan the code, built a mental model, try to see if its testable outside of production, and procure an answer.
In my experience legacy systems, especially when laden with tech debt, require an awful lot of this if you're doing anything more than just keeping the lights on.
People want to know a specific behavior of a system. How often does X happen? What kind of things can trigger Y? Maybe there is documentation, but even if there is nobody trusts it. If folks could just easily and see they would have.
The only solution is to start reading the source code. Perhaps you even wrote it, once upon a time. Nonetheless, all you can do is scan the code, built a mental model, try to see if its testable outside of production, and procure an answer.
In my experience legacy systems, especially when laden with tech debt, require an awful lot of this if you're doing anything more than just keeping the lights on.