First, raw material classification and supplier evaluation and selection
1. The production of raw materials should be classified management, highlighting the key
Hardware companies need a wide variety of raw materials, but different raw materials have different effects on the quality of manufactured products. In order to facilitate the control of procurement quality, the raw materials should be categorized and managed according to the degree of influence of the raw materials on the quality of the products. Generally divided into three categories:
A type of raw materials: refers to the production and use process, which may have a direct and significant impact on product quality (such as may have a direct impact on the key functions and performance of the product).
Class B raw materials: refers to the production and use process, which may bring indirect or more important impact on the quality of raw materials.
C-type raw materials: refers to the general auxiliary parts, the impact of the general or slight raw material quality.
2. Evaluation of raw material suppliers
Practice shows that whether the quality of purchased raw materials is stable depends largely on the quality management of suppliers. Therefore, the quality assurance ability of various raw material suppliers should be evaluated before procurement.
(1) Evaluation of Class A Raw Material Supplier
The focus of evaluation of Class A raw material suppliers is generally to conduct on-site inspections and evaluations of their quality system operating conditions, past supply conditions, and the ability to handle and rectify when supply quality is abnormal, as well as scheduled delivery and delivery capacity, and their product cost/performance ratio. Its after-sales service capabilities (including after-sales service attitude, timeliness, effectiveness). At the same time, it is also necessary to review the supplier's data, investigate and understand the suppliers' other customers, test and provide samples of raw materials, and provide regular analysis of raw material quality.
(2) Evaluation of B and C raw material suppliers.
Generally do not visit the site, mainly consult the suppliers to provide information, to provide samples of raw materials for testing trials, analysis of the results of regular analysis of the quality of raw materials, etc., to achieve the evaluation of suppliers. Its: For B grade raw material suppliers' evaluation, the Procurement Department puts forward the "B-type Raw Material Supplier Appraisal List" to provide B-type supplier related data, or previous B-type raw material inspection, usage, etc. Quality, service, price, and other information and information , send relevant technology, manufacturing, quality, finance and other relevant departments to sign (accreditation), and report to the top management for approval; for the evaluation of the ability of the class C raw material supplier, the procurement department puts forward the “C class supplier evaluation list†by quality, After the signing of the financial affairs and the signing of the purchasing department manager, they will be executed.
3. Selection and determination of raw material suppliers
Qualified raw material suppliers should be determined by choice. Obtaining a qualified raw material supplier depends on the above-mentioned factors such as the evaluation results of each supplier's quality assurance ability, production and use conditions, prices, and credit. Therefore, to finalize the supplier, several suppliers of the same kind of raw materials should be appropriately selected for comparison, in particular, the production and use conditions and the quality assurance capabilities of all suppliers are basically equivalent.
Second, strict control of raw materials into the factory
Purchasing raw materials from qualified suppliers is not always a good thing. The qualification of the supplier only indicates that the supplier has the basic conditions for providing relatively stable quality of raw materials, whether the actual quantity of raw materials received is in short supply, and whether the quality can meet the production requirements is still not certain. Therefore, before entering the factory, the raw materials should also strictly comply with the following requirements to ensure good quality of the factory.
1. There is no need to check raw material acceptance. Should be based on raw material procurement contract, with the counterparty "certificate", "Material" and other quality certification materials acceptance; for individual low-value consumables and difficult to issue the corresponding "certificate", "Material", must be provided in advance samples. For raw materials without "certificate" and "material book", acceptance and storage shall be rejected.
2. For the need to test the raw materials after passing inspection before storage. Before inspecting raw materials for storage, the purchasing department shall fill in the “Send Inspection Record†and submit it to the professional inspection department. After the professional inspection department issues the qualified inspection report, it will be put in the warehouse according to the qualified report. If the inspection fails, you should fill out the "Rejected Product Record" form and fill in the quality information feedback one-time quality competent department feedback, request the procurement department to handle the return and replacement procedures.
3. Establish timely acceptance records after checking the income database. The custodian shall establish a Record of Acceptance of Raw Material Receipts. The record shall include: raw material name, specification, model, manufacturer, arrival time, arrival quantity, qualified quantity, acceptance time and corresponding quality certificate; and according to the material type, name, Specifications are posted separately for the purpose of future enquiries and confirmations.
4. The raw materials used for emergency or quality certification are not fully accepted. For materials that are urgently used or quality certification materials are not complete, one-time quality feedback department shall fill in the information quality feedback. The quality management department shall urge the procurement department to submit the quality certification materials, and store the raw materials according to the acceptance inspection procedures. If you fail to qualify, you can go through the acceptance procedure after you have verified the quality.
5. Acceptance quality of materials Appearance of raw materials should be inspected for damage and defects, and see if there is any corrosion or leakage in the packaging. Check the product name, grade, specification, etc., by unpacking, and pass the product qualification certificate and packing list acceptance.
6. For the internal quality problems that can only be revealed during the installation and use phase, the raw material custodian should establish a quality tracking card, keep in touch with the production and use unit, master the first-hand information, make sure that the problem is found and timely feedback, and notify the supply department to handle according to the regulations. .
Third, strict quality control of incoming raw materials
Preventing the deterioration of imported raw materials and controlling the procurement of raw materials continue to be key to the following management.
1. Manage raw materials for storage. For stocks of raw materials, especially A-type raw materials, they should be inspected frequently to ensure that they do not suffer from tides, corrosion, rust, mildew, rottenness, change, deterioration, frost, damage, or loss. .
2. Treasury environmental management. The shelves and articles in the warehouse should be arranged reasonably, the passages should be smooth, and the doors and windows should be free of damage. The “three nets†(ground, doors, windows, and shelves) should be provided, and there should be no sundries, garbage, and dust.
3. Warehouse raw material stacking and covering. Stacking cover also ensures that the library has an important aspect of raw material quality. Inventory raw materials must be properly stacked and covered according to their performance and storage requirements. Special consideration should be given to the performance of Class A raw materials, the quality of packaging, and the ground conditions of the warehouse, and appropriate methods of palletizing should be adopted to achieve flood prevention and moisture protection.
4. Check raw materials. When raw materials enter the warehouse, inspection and palletizing shall be carried out in accordance with the requirements for classification and maintenance of raw materials. Regular or regular inspections shall be conducted to eliminate and deal with hidden dangers in time.
5. Raw material delivery management. The principle of "first-in, first-out" should be followed, and in particular, the long storage period, large stockpiles, difficulty in checking raw materials, and the timely release of such raw materials should be required. At the same time, standardize the storage process behavior to avoid the damage caused by the handling process to the quality of raw materials.
Fourth, regular analysis of raw material procurement quality
Regular analysis of the quality of raw materials procurement, many metal mold companies easily overlooked, but very important links. Regular analysis of the quality of raw material purchases can be used to determine whether suppliers have a regular supply of raw materials with stable quality, and provide important information or even evidence for supplier selection and adjustment after the next step in the production process quality control.
Regular analysis of the quality of raw material purchases shall be carried out. Type A raw materials shall be carried out once a month. Type B raw materials shall be conducted once every six months. Type C raw materials shall be conducted once a year. The main contents of the analysis are: statistical analysis of the acceptance results of trials of raw materials, testing, etc.; status of delivery and delivery of suppliers as scheduled; processing and rectification of abnormal supply quality.
In short, metal mold enterprises not only pay attention to the production process, pay attention to efficiency, but should pay more attention to the quality of raw material procurement. Do a good job in the quality management of raw materials for procurement, and strengthen the quality control of the procurement process, so that product quality can be reliably guaranteed on a solid basis.