Specific, definite, concrete Prefer the specific to the general, the definite to the vague, the concrete to the abstract. William Strunk Jr. & E.B. White, The Elements of Style examples
The Design of Design (Cambridge Engineering Series) A Book by Gordon Clegg www.amazon.com What the problem is
What the problem is Sometimes the problem is to discover what the problem is. The heart of systems engineeringComplete and consistent requirements problemsdesignux