A problem statement encouraging elegance is spare, unadorned, clean, and leaves the designer as much room as can be left. This is the hardest part of any design process. A good problem statement is a mentor and a supervisor. It asks the right question. A good problem statement extends its writer's skill and wisdom so that, if those are in short supply, the problem statement can make up for some of that itself.
Citation:
Daniel Geer Jr., "The Problem Statement is the Problem," IEEE Security and Privacy, vol. 3, no. 2, pp. 80, Mar./Apr. 2005, doi:10.1109/MSP.2005.53