stories to concisely define the desired system functions and provide the foundation for Agile estimation and planning. o They describe what the users want to accomplish with the resulting system. User continue to refine it as they learn more from the development sprints and releases. Cost Estimation  Cost estimation in an Agile environment is challenging  The challenge within DoD is often a resistance

 Experiment: Economist Subscription, Errands for Pen and Suit  Agile tie-in: Size and cost estimation – does anyone really know in absolute terms how many SLOC it will take a build a product or capability