“An adaptive development process has a different character from an optimizing one. Optimizing reflects a basic prescriptive Plan-Design-Build lifecycle. Adapting reflects an organic, evolutionary Envision-Explore-Adapt lifecycle. An adaptive approach begins not with a single solution, but with multiple potential solutions (experiments). It explores and selects the best by applying a series of fitness tests (actual product features or simulations subjected to acceptance tests) and then adapting to feedback.”