Quality control system
This page provides information about our quality control system for AC power adapters and switching power supplies. We conduct thorough management at our factory. For more detailed information, please do not hesitate to contact us.
What is quality control?
Quality control, defined by "JIS Z 8101 Quality Management Terms"(JIS=Japanese Industrial Standards), is the system of economically producing goods or services that meet and exceed the buyer's demands. Quality control employs statistical methods, often called QC and modern quality control. Hence, it is also called statistical quality control or statistical process control. This focus on meeting customer demands makes quality control crucial in our operations.
Effectively implementing quality control requires the participation and cooperation of everyone in the company, including executives, managers, supervisors, and workers, through all stages of corporate activities. This includes market research, research and development, product planning, design, production preparation, purchasing and outsourcing, manufacturing, inspection, sales, after-sales service, finance, human resources, and education. Quality control implemented in this comprehensive manner is known as company-wide or total quality control.
In essence, quality control is the system through which a company comprehensively understands the quality demanded by customers and society, economically produces products that meet these quality standards for the market, and achieves customer and societal satisfaction. This system requires all company departments to improve and maintain quality efficiently.
Our quality control system
About "grasping the quality required by customers."
We are implementing the following initiatives.
- Our company's sales brunch and our factory hold a meeting with customers on technical specifications
- Draft of product specifications
- Evaluation by technical samples (ES: Engineering Samples), identification of problems
- Reliability evaluation by customer sample (CS: Customer Samples), identification of problems.
- In addition to the design department, the quality assurance department (QA department) conducted design verification from a third-party perspective.
- Conduct design review
- CS customer submission
- Acquisition of product specifications approval
About "to economically produce quality products conforming to this and put it on the market."
- We are implementing the following initiatives.
- Acceptance inspection for all purchased parts based on ANSI / ASQC Standard Z1.4
- For all purchased parts, fluorescent X-ray equipment was used to inspect the content of RoHS-specific hazardous substances.
- For the solder of the jet flow solder bath, the content of lead is inspected every day by fluorescent X-ray equipment.
- For the transformer, the Magnet wire winding number · winding method (coarse winding, close winding) · winding method of insulation tape · several turns, etc., were disassembled and inspected.
- Disassemble and inspect soldering quality for DC code (plug, USB, core).
- Based on the process FMEA, prepare a QC process chart and operation standard document (SOP: Standard Operating Procedure) and build a production line.
- When a defect is detected in the production line, the worker presses the alarm button to issue an alarm, call the person in charge of the production line, and quickly report the trouble information to the previous process.
- In the production line, after a break, every two hours, not only before the start, the person responsible for each production line is thoroughly informed of the latest trouble information and work precautions.
- IPQC (In-line Process QC) of the QA division periodically visits the production line to check whether the worker is performing SOP-compliant work, checking specifications of serving parts with BOM, temperature of soldering iron, Torque driver torque value, setting of various jigs and tools, etc. are inspected.
- For shipment inspection, inspection is carried out based on ANSI / ASQC Standard Z1.4 by shipping lots for each pallet so that it can be inspected finely.
On "Efficiently Improving and Maintaining Quality for All Departments of Corporate Activities to Get Customer and Society's Satisfaction"
We are implementing the following initiatives.
- At the beginning of the year, all divisions set targets and work towards achieving them. Management review meetings are held once a month, during which management confirms progress and points out necessary improvement points.
- Regarding daily quality improvement activities, persons responsible for each production line and QA participate daily after a fixed time to share nonconformity information to prevent recurrence.
- Regarding market complaints, when QA analyzes, and the cause of failure is attributed to work, reflection on SOP and improvement of jigs and tools, when caused by parts, feedback to parts makers (including process audit), when due to design, We are implementing reflections on design standards to prevent a recurrence.
You can get the product catalog in PDF.
Product initiatives
Since 1989, UNIFIVE has maintained the quality of their AC power adapters and switching power supplies through rigorous quality controls.
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