**4.4. Design evaluation method**

and 635 method. The former is free expression of team members, not bound to each other, and open to freedom. By this free style, the creativities of the group are stimulating, while the latter is to be silence in the whole previous period. Each one needs to avoid mutual interference and privately express their ideas in a recorded way. According to the nature of the creative proposal, it can be divided into active stimulating and passive stimulating. The typical representatives are the comprehensive method and enumeration method. The former uses abstract expressions to let the team members of different professional backgrounds associate with each other freely; the latter is based on existing objects, enumerate expressions and deep cognition one by one, and then use these expressions as sources of creativity. Flexible selection of different creative techniques at different stages of design is needed. As shown in **Figure 16**, it is a passive method by which we can make ourselves much more aware about the design

This stage of creating techniques is designed to complete the visualization process from design concept to product modeling. After completing the functional positioning of the product, the product structure and the later modeling design become the final platform for design creativity. Therefore, the product design method mainly includes the following three steps.

Firstly, decompose the product into individual parts according to the previous function and form positioning. Secondly, confirm the changeable parts of each shape. Thirdly, the changeable part is changed. Finally, recompose the relevant individual parts into a complete one, and select the best shape you evaluated. For example, a simple face will be a brand-new one

purpose and processes after the relevant technique.

46 Product Lifecycle Management - Terminology and Applications

**4.3. Product form design method**

**Figure 16.** Questioning.

Design evaluation is to compare and evaluate the solution to the problem in the design process, thereby determining the value of each program and judging its merits and demerits in order to screen out the best design. The meaning of "program" here is extensive and can be in various forms, such as principle program, structural program, modeling program, etc. From the perspective of its carrier, it can be a component or an overall drawing, or it can be a model, a prototype, a product, etc. In general, the "program" referred to in the evaluation is essentially the answer to the problems encountered in the design. The significance of design evaluation is to consciously control the design process, to target the direction of the design, and to assess the design plan with scientific analysis rather than subjective feeling, which provides designers with the basis for judging design ideas. Through design evaluation, the quality of design can be effectively guaranteed, and the best solution in which all aspects of performance meet the target requirements can be selected among many design programs. Secondly, proper design evaluation can reduce the blindness in the design and improve the efficiency of it. In addition, the applicative performance of evaluation can effectively verify the design plan, find out deficiencies during the process, and provide the basis for deeper design improvement.

In the actual evaluation process, due to the complexity of the design factors, the main influencing factors are generally selected. According to different design objects and different stages of the design, different evaluation objectives are determined, and the most appropriate content is selected to establish the evaluation target system. After selecting the evaluation items, the

**Figure 17.** Questioning method in general form design.


**References**

2000. p. 754

[5] www.ha47.net

[7] www.fiberglass365.com.cn

[1] The American Heritage Desk Dictionary. Boston/Beijing: Houghton Mifflin Company;

Product Design Process and Methods http://dx.doi.org/10.5772/intechopen.80821 49

[2] Zhaoquan J. Industrial Design Methodology. Beijing Institute of Technology Press. p. 9 [3] https://timgsa.baidu.com/timg?image&quality=80&size=b9999\_10000&sec=15319728 36154&di=e54f8d5c6b8706a6832544882fa85183&imgtype=0&src=http%3A%2F%2Fs4.

sinaimg.cn%2Fmiddle%2F62d0f68fhaf3d708ba9b3%26690 [4] https://zhidao.baidu.com/question/1830124859930470580.html

[6] http://weili.ooopic.com/weili\_10269704.html

[8] http://auto.qq.com/a/20090226/000162\_2.htm

**Figure 18.** Design evaluation.

weighing coefficients are, respectively, set according to the importance of each evaluation item, and the entire project evaluation process is finally completed as shown in **Figure 18**.
