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Quality Assurance System
“We, New Japan Radio Co., Ltd., continually creativity to improve our business and thus produce adaptable products and services of high quality that meet the satisfaction of our customers.”, is our Quality policy.
To our customers we proffer the product which is high efficiency, high quality, high reliability, and we always consider earth environment. In the present circumstances, the electronic equipment has been upgraded with its performance and plays important role in any industry. Therefore default of the equipment might cause a serious problem on the system. Year after year, IC of our electronic equipment is requested the higher quality and the higher reliability.
In order to meet such rigorous requirements, we acquired ISO 9001 and ISO / TS 16949 as a quality management system and ISO 14001 as an environmental management system, respectively.
We will make unremitting efforts to offer the products of higher quality and higher reliability relentlessly that customers can be more at ease to use.
Fig.1shows New JRC's quality assurance system from the planning to shipping and customer services.
2.1 Production Planning
Before we make a plan for new products, we research into the customer needs and a trend of market extensively based on our business. Finally, we decide the planning for the new production at the New Products Development Meeting.
2.2 Design, Pre-production(Design Review)
We design the product to meet the customer's requirement by close communications. The design makes by using the CAD system , and is based on the design rules justified reliability. For the quality of the design we check production technologies, development data and quality information by Design Review (DR).
2.2.2 Test Production
The test products are assessed the characteristic and the reliability.The reliability evaluation method and condition shall be performed by EIAJ ED-4701(JEITA) specification.The mass production is able to be started after consideration of process capability, yield result, reliability test result and customer's evaluation of ES(Engineering Sample).
2.3 Mass Production
2.3.1 Quality control of Raw Materials
We make effort to improve the quality of the raw material by quality approval of the materials, the purchasing specification, incoming inspection and close communication with the vendors.
2.3.2 Process Control
In addition to raw materials, process control effects importantly the quality. We make effort of avoid scattering products by the standardization and automatic system. We check the performance and the quality by the QC inspection. Fig.2 shows an example of process control and Fig.3 shown inspection specification.
2.3.3 Environment Control
The environment during IC production effect importantly the quality and reliability. We control properly the temperature, the humidity and the dust in fabrication. Especially for the high quality and high reliable production, we make the utmost effort to improve the cleanliness for the dust control is the most important factor.
2.3.4 Production equipment and facility control
Production equipment and facility control is very important to maintain the quality, characteristics and reliability. To keep our production, we prescribe the rule of maintenance and inspection for production equipment and facility. Therefore we can maintain a stable productivity.
2.3.5 Measuring instrument control
Measuring instrument control is the basis of quality assurance. Therefore the quality of products is greatly influenced by control of measuring instruments at the production line. We maintain a high precision at our measuring instruments in accordance with the rule of national standards. Periodically, we entrust the maintenance of our measurement instruments to the traders or public institution.
2.3.6 Change control and corrective action
Certainly, we change a condition of the design, the process, the material and facility in accordance with the change control system. We maintain this change control system to prevent occurrence of nonconformance. On this system, the changing of specification or characteristics is performed after customer's approval. Finally failure analysis data at the production process is notified to the related sections, and we can prevent a recurrence of an accident.
2.3.7 Sub-contractors control
The sub-contractor when we entrust the production, or the customer when we buy the parts and materials, we investigate the quality assurance system. Our investigation is carried out when we entrust the production for the first time. The investigation of quality assurance system is continued regularly or temporary. We hold a regularly meeting and process patrol, and we maintain the quality control system at the incoming products.
2.3.8 Education and training
Our educational policy is "We educate our employee for the individual growing, and for New JRC's development" We educate to employee at the all sections, and all classes. Our educational course is consisted of three items, "On the job training, Off the job training and individual education". The education according to our educational program is enough to satisfy a public circumstances.
2.3.9 QC circle
The activity of QC circle is a trigger at the individual or mutual education. We are promoting the activity of this QC circle as a part of the TQM activity. Employee’s consciousness is essential power of our development. In accordance with their independent management, the employees use the QC skills to improve the quality of the products, the services and the working at the QC circle.
2.3.10 Internal quality audit
The internal quality audit is performed by the team consisted of the qualified auditors. At this internal audit, periodically, the auditors confirm whether the activity of quality assurance is conformed or not to the planning.
2.3.11 Quality Records Control
On our quality system, we provide the data obtain at the production, the process, the quality audit and the customer audit for quality records. We provides the rules to make use of quality records effectively.
2.3.12 Document System
The document system which composes the quality management system in our company is shown in a right picture.The quality manual is made the top based on the demand with ISO9001, and in all sections which compose each system, various documents are made and operated.
|INSPECTION ITEM||QUALITY CHARACTERISTICS||LEVEL||AQL(%)|
|Major Defect||Open,Short,Function defect,No mark,Wrong mark,
|External Visual||Mark unclear,Chipping,Scratch,Out-of-dimension,
|Electrical Characteristics||Items which maximum and minimum values are specified
in Electrical Characteristic test.
- Sampling: Apply ANSI/ASQC Z1.4-1993 (Equivalent to MIL-STD-105D)
- Ambient Temperature 25±3[°C]
- Relative Humidity 75[%] or less
In the case of device trouble on the customer's operation, we request that customers should send back it. With the troubled products, cause of troubles founded by our salesmen are returned to our factory. Generally, the quality assurance section is responsible for failure analysis. The design section or the engineer section is responsible for the application troubles. Failure analysis data are returned to our quality assurance section. After we totally reevaluate these failure analysis data, we report the failure analysis data to customer by way of salesman. These data returned to the design section, the engineer section and the manufacturing section, are useful for preventing of troubles and progressing in the product's quality.
|Fig.4 Customer Returning and Failure Analysis Route||Fig.5 Failure Analysis Procedure|