The agile approach continuously assesses and prioritizes business value to ensure that the most valuable work is delivered at any point in time, always using the end customer perspective. It is also imperative to question the purpose behind requirements, challenging those requirements that do not support the business goals. Agile approaches enable the art of maximizing the amount of work not done, something essential to deliver valuable software early and continuously. The techniques outlined in this section facilitate the valuation of product needs on an on‐going basis.