That said, not all applications of the mechanism framework require a fully articulated metaphysics. Work on discovery and explanation might proceed perfectly well without embracing any particular metaphysical world picture. Philosophers with different interests (discovery, explanation, testing, reduction, emergence, and so) are likely to elaborate the concept in different ways. There is every reason to doubt, that the idea of mechanism can be given a one-size fits all metaphysical analysis that will adequately address the diverse philosophical ends to which the concept is being deployed.