The Design is based on an empirical philosophy and largely consistent with the method and method development. Design significant empirical evidence of design supports the likelihood of this perspective when describing the reality of true designers. Design to enjoy the rational model the action-centric model sees Design as informed by research and knowledge.
However, the research and knowledge are introduced in the design process through judgment and common sense for designers about their feet rather than through the predictable and controlled process determined by the rational model. Contextual experience and Design professional assessment occupy a central place more than technical rationality.