1. Raw material inspection (IQC)

1. The original incoming factory inspection includes three aspects:

① Inventory inspection: raw material product name, specification, model, quantity Whether it is consistent with reality or not is usually done by the warehouse management personnel.

②Quality inspection: Check whether the physical, chemical and other properties of raw materials comply with the corresponding raw material inspection regulations. Sampling inspection is generally used.

③Trial inspection: Take small batch samples for production and check whether the production results meet the requirements.

2. Handling of unqualified incoming materials:

① Marking: Mark "unqualified" on the outer packaging, stack it in the "unqualified area" or hang "unqualified" Signage, etc.

② Disposal: Return or transfer of goods or other special purchases.

③Corrective measures: Provide relevant requirements or suggestions to suppliers to prevent the recurrence of batch failures.

3. Emergency release: Due to urgent need for production, materials that need to be used before the inspection report is released are emergency release. Samples need to be retained for inspection, and the released materials must be specially marked and recorded so that they can be tracked when necessary.

4. Special procurement: ① Purchase materials from non-qualified suppliers - strengthen inspection.

② Materials used due to unqualified inspection - selected or repaired for use.

5. Special attention should be paid to the losses caused by substandard products:

① It was discovered during the investment stage that the loss cost was 1 yuan.

② During the production stage, it was discovered that the loss cost was 10 yuan.

③ Found in the hands of the customer, the loss cost is 100 yuan.

2. Process inspection (IPQC)

1. The inspection scope of IPQC includes:

①Products: quality of semi-finished products and finished products.

②Personnel: The operator’s process execution quality and equipment operation skills are poor.

③Equipment: Equipment operating status and load level.

④ Process and technology: Whether the process is reasonable and whether the technology meets the product characteristics requirements.

⑤Environment: Whether the environment is suitable for product production needs.

2. Process product inspection: There are great differences and flexibility in the inspection methods for product inspection. The inspection methods can be more flexible based on the actual production situation and product characteristics.

3. Full inspection by quality inspectors: It is suitable for process products with multiple varieties and small batches and fatally defective items when key processes are transferred. If the workload is large, if the work is qualified, it will be allowed to be transferred to the order or stored in the warehouse. If it is not qualified, the operating staff will be required to immediately rework or return for maintenance.

4. Sampling inspection by quality inspectors: It is suitable for process products that are in large quantities, have low unit value, and have no fatal defects when the general process is transferred.

5. Employee self-inspection: Operators conduct self-inspection on the products they process first. Only after passing the inspection can they be sent to the next process. It can improve the pass rate of product circulation and reduce the workload of quality inspectors. It is difficult to manage and control, and sudden abnormalities may occur from time to time.

6. Mutual inspection of employees: The operators of the next process will inspect the products of the employees in the previous process. They may not accept defective products from the previous process. Mutual supervision will help mobilize enthusiasm, but it will also cause problems. Abnormal quality caused by shielding and arguing.

7. Combination of various methods: organically combine various inspection plans to learn from each other's strengths and prevent defective products from flowing into the next process or into the warehouse, but the inspection cost is high.

8. Process quality inspection: inspection of personnel, equipment, technology, environment, etc.

3. Finished product factory inspection (OQC)

Factory inspection must be carried out before finished products leave the factory, in order to achieve the goal of zero defective products leaving the factory, customer satisfaction and zero complaints.

1. Inspection items include:

① Finished product packaging inspection: whether the packaging is firm and meets transportation requirements, etc.

②Finished product identification inspection: such as whether the trademark batch number is correct.

③Finished product appearance inspection: Whether the appearance is damaged, cracked, scratched, etc.

④ Finished product performance inspection.

If the batch is qualified, it will be released. If the batch is not qualified, it should be reworked or repaired in time until it passes the inspection