The notion of a thermal optimum persists There is an underlying assumption that the best thermal environment never needs to be noticed, and that once an objectively "comfortable" thermal environment has been provided, all of our thermal needs will have been met. The use of all of our extremely sophisticated environmental control systems is directed to this one end—to produce standard comfort zone conditions. Lisa Heschong, Thermal Delight in Architecture heatcomfortenvironmentux
What the problem is Sometimes the problem is to discover what the problem is. Gordon Clegg, The Design of Design (Cambridge Engineering Series) The heart of systems engineeringComplete and consistent requirements problemsdesignux