[mizchief2]

estimating is either easy or impossible. You either have done it repeatedly and have data to show how long it took, or you have no fucking clue.

Focusing on the most important features of each module first, and then the most important of the next then the next with a focus on progress towards something useful is the only way to go.

When you have a consistent team and some tracking data to compare task size to hours required to complete, then you can start doing estimates for future work, but you never have to ask the dev team to estimate other than setting some relative size between tasks and trying to stick to the sizing system. I prefer Fibonacci story points, but it can be anything that has a number.