These process models usually comprise a number of phases or stages, beginning with a statement or recognition of a problem or a need for a new design and culminating in a finalised solution proposal. In his 'Systematic Method for Designers' L. Bruce Archer produced a very elaborate, 229 step model of a systematic design process for industrial design,[24] but also a summary model consisting of three phases: Analytical phase (programming and data collection, analysis), Creative phase (synthesis, development), and Executive phase (communication). The UK's Design Council models the creative design process in four phases: Discover (insight into the problem), Define (the area to focus upon), Develop (potential solutions), Deliver (solutions that work).[25] A systematic model for engineering design by Pahl and Beitz has phases of Clarification of the task, Conceptual design, Embodiment design, and Detail design.[26] A less prescriptive approach to designing a basic design process for oneself has been outlined by J. Christopher Jones.[27]