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Over the last 40 years, many approaches to design have been put forward by various researchers, designers and engineers, both in academia and industry, on how design ought to and might be carried out. These proposals on design have tended towards what has come to be regarded as design philosophies, design models and design methods. The thesis of this paper is to discuss various aspects of generic research in design, within the above classifications in the light of the work that has been done in the last four decades. Discussions will focus on various definitions of design, design theory and methodology, the nature and variety of design problems, design classifications, philosophies, models, methods and systems.

Information abstraction and modality significantly affect its interpretation, so it is important that feedback given to the design engineers should be in the language understandable to them and is able to convey necessary information with minimal interpretation. An experiment has been designed to evaluate performance and workload differences between expert and novice design engineers when they conduct design tasks in feedback modalities.