The application of the knowledge inspection tool can suspend the current design process on condition of not changing design, and preview the impacts to the design process when changing certain parameters. It is important to judge how to change the parametric model when one or more parameters change in the design process. Simultaneously, it is also important how to modify the design and make the design meet the scheduled design requirements for designers. Knowledge inspection is a tool for studying the impact and relevance between perimeters, whose functions are as follows: a. knowledge inspection can provide rapid feedback information after parameters changing through a ‘‘what if’’ analysis format, which can help designers to test analysis and optimization of the design and understand the impact of changing the current design process parameters (such as material, pressure and space parameters, etc.); b. knowledge inspection can provide designers detailed information on modifications to the design process to help designers to decide how to change the design to achieve satisfying design results.