What is the need for an “Estimate”, because everything is bound to change rite in actuality. Before coming to the need for estimation let us set the context for this discussion. Estimation is nothing, but a human being’s an innate necessity of wanting to predict the future with the term “Accuracy” directly relating to the probability of the expected outcome. In simple terms, we want stuff to happen the way we want and when we want.
Agile is the most discussed software development methodology, and probably the most widely accepted as the way forward for modern software development teams. The reason (IMHO) anything is this much discussed and written about is that the practices haven’t been carved in stone yet, are still in the evolving phase, and are in some way even disputed. There is so much going on in the Agile transformation initiatives that it’s possible the definition of agile development is different from company to company.