Design is the envisioning and communication of something which is to BE … physical, yet is NOT… physical ref
Moreover, Design with a capital ‘D’ is different from design with little ‘d’. Explanation – the 'design' of an artifact is merely a subset of 'Design' that identifies, and then solves a problem (in entirety) [proposed by Larry Barrow - Little “d” and Big “D” Design”].
We often confuse the two terms and believe that the former is all that is required. Design is iterative. In Design, interdisciplinary interaction is important, and often welcomed. However design (with the little ‘d’) is still a proprietary activity…one where the decisions are made solely by a single protagonist, working to develop the artifact, not a solution.