While team estimates the user story of the current sprint, for the product roadmap, do you do or get the estimation done for future Product backlog items (Epics/Features) ? How is that done in your organisation? Who does it?

While team estimates the user story of the current sprint, for the pro

1.	While team estimates the user story of the current sprint, for the product roadmap, do you do or get the estimation done for future Product backlog items (Epics/Features) ? How is that done in your organisation? Who does it?
Answer» While TEAM estimates the current SPRINT backlog, for FUTURE roadmap, which is highly flexible it is advisable, not to INVOLVE the team in estimation. The product LINE (Product manager, Product Owner etc) could do the rough estimation based on historical data.