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| QUALITY CONTROL DEPT SYSTEM
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Custom membrane switch products
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Printec takes full advantage of the latest technology for verifying product quality. We will custom design and manufacture membrane switch assemblies in high or low quantities as an individual component part or in combination with metal sub-panels, enclosures, cables, electronics, printed circuit boards, Electro Luminescent lamps or bezels.
(See options and features below and call us for the exciting details) |
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| ·Function ·Test Smt-Pick&Place |
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QUALITY CONTROL MANUAL
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1. FORE WORD
2.ORGANIZATION
2-1 PURPOSE
2-2 RESPONSIBILITY
3.INCOMING QUALITY CONTROL
3-1GENERAL
3-2 SAMPLING PLAN
4. IN-PROCESS QUALITY CONTROL
4-1 GENERAL
4-2 SAMPLING PLAN
4-3 DEFECTIVE CLASSIFICATION
4-4 PRODUCTION SHUT DOWN
5. OUTGOING ACCEPTANCE INSPECTION
5-1 GENERAL
5-2 INSPECTION ITEMS
5-3 SAMPLING PLAN
5-4 SHIPMENT CONTROL
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| ·Packing ·Assy Lines |
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1. FORE WORD
The purpose of this manual being established is to describe the general functions of Quality Control Department. QC Dept. has to take the quality responsibility of purchased/consigned material and finished goods, which includes products working in process to ensure product's quality & reliability. So that the material incoming quality, in process quality auditing and outgoing quality control will be the major functions of QC Dept. For each function, the system/inspection standard will be issued separately to accomplish the quality control/assurance with necessary records or reports pending on customer's quality requirement. This manual is subject to be reviewed by manager of QC Dept. or his designated representative whenever it is necessary. |
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2. ORGANIZATION
2-1 Purpose: Sampling Plan
Quality Control Department is organized for the purpose of ensuring product quality and reliability consistent with customer's requirements and maintaining a system of surveillance to enable performance of this function.
2-2 Responsibility
Quality Control Department consists of 3 groups. They are (1)Material incoming quality control (2) In-process quality control (3) Quality assurance. The responsibilities of each groups are defined.
2-2-1 Material Incoming Quality Control
a. To perform new material evaluation and qualification.
b. To perform incoming inspection of all direct and indirect materials.
2-2-2 In-process Quality Control
Whenever the material to be input to production line, the inspector of this group has to check/audit the quality in each major stations as material preparation, material thickness, shearing stabilizing, punching printing etc., with inspection standard to ensure right equipment conditions, proper operation, and good product quality.
2- 2-3 Quality Assurance
a. To ensure compliance of finished product with customer's quality
requirements.
b. To perform the outgoing inspection after packing to release for shipment.
c. To be responsible for acceptance planning (sampling place), data collection,
analysis and reporting, corrective action and associated process control
programs to ensure
optimum control of quality through the whole production
lines.
d. To review and analyze all quality related compliance and returns from
customers. Responsibilities including determining failure mechanism,
cause for failure,
corrective action, recommendation and corrective action
follow-up.
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| ·DIE-Cutting ·DIE-Cutting |
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3. INCOMING QUALITY CONTROL
3-1 General:
(1)For the purpose of keeping incoming material and parts above the minimum acceptable quality level (AQL), all production material purchased or consigned for production will be subjected to inspection. And/or tasted by incoming quality control (IQC) inspection and test will be performed according to specified engineering drawings and specifications.
(2)MRB (Material Review Board) is the committee to decide the disposition of the discrepant material found by IQC.
(3)Waive of material should be granted by either the head of MRB or the person who are authorized to waive the lot of material. Waive procedure should be followed by all concerning persons.
3-2 Sampling plan:
(1)According to MIL-STD-105E LEVEL II, SINGLE SAMPING
(2)Acceptable quality lever: Critical Defect: 0
Major Defect : 0.4
Minor Defect : 1.0
3-3 Defective Classification:
Major Defect:
A major defect shall be defined as one which would either be non-repairable, would require prohibitive rework would hinder or prevent the units assembly, would materially reduce the units ability to function as intended, and/or would significantly reduce the sale ability of the finished product.
Minor Defect: A minor defect shall be defined as one which would be a departure from established standards of acceptability, but if present, could either be corrected with an allowable amount of rework would not hinder or prevent the units assembly, would not materially reduces the units ability to function as intended, and/or would not significantly reduce the sale ability of finished product.
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| ·Inspeltion ·Function |
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4. IN-PROCESS QUALITY CONTROL
4-1 General:
(1)Purpose:
To ensure that the working standard laid down by the engineering and quality dept are religiously followed so that defects may be prevented or detected early. This also enable corrective action to be taken in the earliest possible moment to counter the problems detected.
(2)Scope. All on-line gate inspection and in-process audit check belongs to in-process quality control.
(3)Feedback quality information in time is the key point of in-process control. It can keep production flow with normal condition and minimum loss.
4-2 Sampling Plan:
a. Lot: Usually 2 hour production quantity will form one lot, however it is fllexible on needed.
b-1. According to MIL-STD-105E level II, SINGLE SAMPLING
b-2. Acceptable quality level: Critical Defect: 0.4 Major Defect: 1.0 Minor Defect: 1.5
4-3 Defective Classification:
a.Critical: A defect causing or likely to result in a hazardous or unsafe condition.
b.Major : A defect other than critical that is likely to result in failure or reduce the electrical or mechanical performance.
c-1: A defect which may result in a slightly degradation in electrical or mechanical performance. But no any affect for practical use, effectiveness or operation.
c-2: A slight workmanship or appearance defect.
4-4 Production Shut Down:
IPQC will shut down the production running if it is found with the following events:
a.Silkscreen, Fixtures, Jigs, Punch Dies out of work or in bad condition, will affect the quality of products.
b.Poor workmanship due to new worker but without any conduct of experienced worker or the operator is not working according to the correct operation instruction to do his job.
c.High defective rate at some operation points, and had been always existed. IPQC shall collect the shut down hours respond to the labor cost as the internal failure cost of quality cost on a monthly basis.
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| ·Life Tester & Measurement ·Silkscreen Printing |
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5. OUTGOING ACCEPTANCE INSPECTION
5.1 General:
Though the controls of IQC, IPQC and production are to ensure the quality level of our products, it is indispensable for quality assurance to perform outgoing acceptance inspection to finished products prior to shipment. This is a prime QA function to control outgoing products at an acceptable quality level.
5.2 Inspection Items:
1.Appearance visual inspection
2.Electrical functional test.
3.Mechanical dimensional inspection.
4.Packaging inspection.
5.3 Sampling Plan:
1.According to MIL-STD-105E LEVEL II, SINGLE SAMPLING
2.Acceptable quality level:
Critical Defect : 0.4%
Major defect : 0.65%
Minor defect : 1.0%
5.4 Shipment Control:
Quality assurance issues "Shipment Release Notice" to production control to release the shipment based on the QA inspection result. QA people should personally audit outgoing of the shipment by checking lot number, quantities in accordance with QA inspection report. |
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