The company I work for uses scrum methodology, Before each sprint, we do a sprint planning, sprints are 3 weeks long.
I find myself many times getting items, I should break down to tasks and PRICE it with development / QA days, as that's what we do in the planning stage, that I simply have no idea how long it would take and there's no way that without a proper drill down to code I will be able to know it.
I explained to the R&D manager, that I cannot commit on "DONE" for such items, I can however commit on the research time it would take me to understand what should be done (E.g. drill down to code, provide fun specs, etc).
Is this the correct approach or maybe there's a better one?
Answers would be appreciated.