When would you be possible to make use of a descriptive mannequin of the design course of? When would you employ a prescriptive mannequin? Descriptive mannequin of the design course of is a linear mannequin, suggestions sin’ t mentioned and it’s extra easy than the mannequin generally known as prescriptive which is an prolonged mannequin compared with the descriptive one. In descriptive mannequin, based on consumer’ s targets, various ideas are launched by totally different idea schemes, with no drawback definition and the method improves, relying on feasibility of the design.

On this state of affairs, closing design of descriptive mannequin displays the designer’ s remark and expertise. No suggestions is mentioned. So this mannequin might be regarded as a pre- design course of (though the ultimate design embrace all details about manufacturing) when a brand new product might be launched. Nevertheless in prescriptive one which is prolonged, the issue is recognized based on consumer’s assertion. Within the stage of drawback definition; objections, necessities, constraints and features are outlined by taking codes, laws and specialists opinions into consideration.

So the method improves. In the meantime, conceptual designs might be regenerated or drawback might be redefined with testing and evaluating the existed preliminary design, by inner suggestions.

Then again, drawback might be redefined by consumer’ s statements or questionnaires and the design course of might be reestablished after the product has been Launched commercially, by exterior suggestions. Prescriptive mannequin can be utilized as a practical and relevant course of in comparison with descriptive one when a brand new product is Launched or when a business product Is needed to be improved constantly. ) Clarify the distinction between duties, strategies and means. Duties are the Jobs which must be completed for getting the outputs In every stage of design course of. Strategies are the procedures or systematic methods which must be utilized for performing the duties In every stage of design course of. Means are the Devices or methods which must be used for carrying on strategies or procedures In every stage of design course of. So means are the methods to use strategies that are the methods to carry out the duties.