Evaluation of Product Design Quality of Printing Manufacturers (II)

1. Build a multi-functional evaluation team

The design quality evaluation was completed by the Multifunctional Working Group. Its members should be able to reflect the needs of various aspects of the product life cycle such as market research, product design, procurement and supply, manufacturing process, inspection, packaging and storage, cost control, and environment and safety in the evaluation. Participate in assessments with experts outside the company (need to have confidentiality agreements). In order to form a competent and efficient working group, the qualifications of members of the evaluation team need to be stipulated. In order to enable members of the group to provide quality assessment opinions, they should be provided with conditions for full understanding of the design. The manager of each department should also proceed from the overall business objectives of the company and ensure that the assessment of the dispatched personnel takes time.

Designers understand that market demand and degree determine the degree to which their designed products meet this demand. Therefore, designers need to obtain market demand information most directly. However, due to different division of labor, designers cannot maintain direct contact with the market as long as market research and sales personnel. Therefore, it is very necessary to listen to the latter's opinions in the process of design quality evaluation. Conflicts in the evaluation process will inspire sales staff to generate valuable suggestions for improvement.

2. Evaluation System Modeling Process

The hierarchical structure of the product determines the characteristics of the design quality evaluation system. Contains sub-indicator nodes and composite indicator nodes. Its implementation is accomplished through the implementation of the included sub-indicators. The degree of influence of each sub-indicator on its parental indicator can be measured by its importance. The degree of importance is divided into 4 levels. The larger the value, the more important it is.

The evaluation index of products, components, and parts is a set of indicators. Before the evaluation, it is necessary to list the evaluation items and assign values ​​for each item. Some of these values ​​are fixed values, some are a range, and some are a rating value. The evaluation is to compare the index set of the design selection with the required index set and determine the difference. If the limit is exceeded, the design must be modified. Some indicators are key indicators that are not achieved when they are not reached, regardless of whether other indicators are met.

Product design is the process of solving the solution layer by layer. When solving the solution to the lower layer, the constraint of the upper layer may be modified. At this time, the evaluation items and indicators should also be revised accordingly and re-evaluated.

The integrity test is to see if the parent index is achieved when each sub-indicator is implemented. The independence test is to see whether the sub-indicators are related to other indicators. If relevant, new indicators are used instead of the sub-indicators, and the executable test is to ensure that the evaluation indicators can be supported by specific data. If they are not executable, they need to be excluded.

3. Evaluation task solving and evaluation results

Evaluation tasks should be evaluated using the evaluation criteria. The criteria usually include two categories of rules and experience criteria. The former refers to axioms, theorems, formulas, etc. that have been proved and can be clearly expressed. In the evaluation, only the evaluation questions need to be checked and compared. The latter refers to those that need to be analyzed by the evaluators in combination with their own experience from a large amount of historical information or facts, and extracting criteria with individuals. These criteria are often difficult to express. Evaluators are required to use as much raw materials as possible (including various types of constraints and resource information).
The evaluation methods and methods not only affect the accuracy of the evaluation results, but also affect the evaluation efficiency. The correct evaluation methods and the use of advanced evaluation methods will undoubtedly improve the evaluation quality, virtual motion simulation, virtual processing, virtual assembly available function design, product modeling, and productivity evaluation.

The evaluation object must not only evaluate the design results but also evaluate the design methods. For example: In many cases, overload is inevitable. Design methods to deal with overload are various. Some use increased component strength to resist overload, others use low-value weak-loop protection system, and many sensors are set in the machining center, and overload protection is used to stop and protect the equipment. Each anti-overload design method has its own advantages and disadvantages. The actual design method should be determined according to the specific requirements.

4. Design quality assessment conflict resolution process

In the process of design quality evaluation, due to the different evaluation direction, professionalism, and focus of attention of the experts in each group, the evaluation results are inevitably in conflict. The process of resolving conflicts is to turn local optimization into an overall optimization process.

At present, the actual accumulation of printing and manufacturing enterprises is still very limited, and generally there is no automatic resolution of conflicts, but this method of resolving conflicts is still valuable. At present, conflicts are mainly resolved.

The determination of whether or not the design quality meets the quality requirements can be decided by the evaluation team, but the implementation of the proposal needs to be undertaken by the designer. Therefore, the designer of the conflict resolution plan needs to participate. In fact, in the entire evaluation process, the cooperation and interaction between the evaluator and the designer are indispensable.

The quality of design relates to the success or failure of a product development. The purpose of evaluation is not only to intercept design defects, but to improve product design quality from the whole life cycle. Design quality evaluation requires qualified professionals, standardized procedures, advanced tools and effective knowledge support. Constructing a more stable and effective design quality evaluation model is a necessary condition for a printing manufacturing company to guarantee design quality and strive for a successful product design.