Conduct thorough process reviews to avoid design flaws

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Conduct proper process reviews to avoid design defects. 1 Basic requirements for process reviews: For the process design of a product, manufacturers should establish a hierarchical and phased process review system in accordance with the management level and product development procedures. Producers should determine the process design phase for specific products, establish review points, include them in the product development plan network diagram, and organize hierarchical and phased process reviews. If the process review is not conducted as required or fails, the work shall not proceed to the next stage. Each process review conducted by the producer should involve representatives from all functional departments that affect the quality of the stage under review; if necessary, the users or their representatives as well as other experts may be invited to participate. Before any process design documents are put into practice, an analysis, examination, and evaluation of the correctness, advancement, cost-effectiveness, feasibility, and testability of such designs are carried out. The basis for the process review includes product design documents, development task orders and contracts, relevant regulations, standards, specifications, technical management documents and quality system procedures, as well as the reports on the conclusions of previous review stages. The key objects of process review are the overall process plan, process instructions and other mandatory process documents, critical components and important parts, the process specifications for key processes, as well as the process documents for special processes. 2 Key Points of Process Evaluation I. Evaluation of the overall process plan a. Process analysis and explanation regarding the product’s features, structure, and required characteristics ； b. Analysis to meet product design requirements and ensure manufacturing quality ； c. Explanation of the product manufacturing workflow ； d. Weak links in the process and plans for technical measures ； e. Principles and approaches for the selection and evaluation of process equipment, testing and inspection equipment, as well as computer software for CNC machining and product inspection ； f. Principles for determining and controlling material consumption quotas ； g. Control requirements for the technical condition of products during the manufacturing process ； h. The process preparation cycle and network plan for product development, as well as the cost budget and allocation principles for the implementation process ； i. Evaluation of the correctness, advancement, feasibility, testability, economic viability, and manufacturing capability of the overall process plan ； j-Process: Description of the degree of standardization (documents, elements, equipment, terminology, symbols, etc.). j. Dynamic management of the overall process plan (it should be revised and improved as appropriate in light of the progress made during the development and production phases, so as to remain usable throughout the lifecycle of the engineering project). II. Review of the process specification a. The correctness, rationality, and feasibility of the process flow, process parameters, and process control requirements in the product manufacturing process ； b. The feasibility and effectiveness of the measures taken to address situations where the resources and environmental conditions currently do not meet the requirements specified in the process instructions ； c. Requirements for qualification control of personnel engaged in operation and inspection ； d. Completeness, accuracy, consistency, and coherence of the documents ； e. Whether the files and their modifications went through strict approval procedures, and whether the changes were thoroughly tested and verified. III. Review of process documents for critical components, important components, and key processes a. Accuracy in identifying key processes and completeness of the list of key processes ； b. Whether the process documents for key components, critical parts, and essential manufacturing processes are clearly labeled, as well as the rationality of the quality control points established ； c. The rationality and feasibility of the process flows and methods for key components, important parts, and critical processes, as well as the quality control requirements ； d. Feasibility and effectiveness of measures to address technical challenges in key processes ； e. Have changes to critical components, important parts, and process documents for key manufacturing steps been verified and strictly subject to approval procedures? IV. Review of process documents for special processes a. Coherence between process documents for special processes, process instructions, and quality system procedures ； b. Accuracy of the items, requirements, and methods for process testing and inspection of special processes ； c- Feasibility and effectiveness of measures to overcome technical challenges in special process technologies ； d. Have changes to the process parameters of special processes been thoroughly tested and verified, with strict adherence to the approval procedures? V. Evaluation of the adoption of new processes, technologies, materials, and equipment a. The necessity and feasibility of adopting new processes and technologies, the feasibility of methods for processing new materials, and the suitability of the selected new equipment ； b. Have the new processes, technologies, and equipment adopted been verified as qualified, with corresponding proof of qualification? ； c. Before adopting new processes, technologies, materials, or equipment, have they been tested, experimented with, and verified to meet the specified requirements, with complete original records available? ； d. Whether there are plans for adopting new processes, technologies, materials, and equipment, as well as quality control requirements; e. Requirements for controlling the qualifications of operators and inspectors.