Those don't need to be separate systems, and keeping them in one system is often beneficial to see the evolution of the concept. I'll frequently have an idea a

Those don't need to be separate systems, and keeping them in one system is often beneficial to see the evolution of the concept. I'll frequently have an idea and toss it into a backlog ticket. Maybe just as a title to start. When a customer mentions that problem/feature, I can add that info in the backlog even if it doesn't immediately become a priority. When the issue does become something worth working on, I'll usually add more details but the various evidence accumulated over 6 months of letting the item "bake" is invaluable.