Phihong employs quality measurements in every aspect of the organization including the design and manufacturing processes, supplier management and employee selection and training.

Design Quality

Design Philosophy

We evaluate every design for long-term performance with component derating, statistical tolerance checks, reliability prediction and application abuse survival prediction. This has a significant impact on the dependability of each product.


Design qualification

ALT (Accelerated Life Test) is performed by an independent design audit department to validate conformance to specification and design quality prior to release to production.


Failure Mode Effects Analysis

FEMA is a systematic process used for identifying potential design and process failures before they occur, with the intent to eliminate or minimize the risk associated with them.

Supplier Management

Material controls

Controls include IQC, FIFO, shelf life control and a material review board (MRB), which quarantines incoming materials and drives corrective action from suppliers.


Preferred supplier program

Requires vendors to adhere to strict standards in order to qualify for our “preferred” list and to take corrective action to maintain preferred status.


Production Control

Outgoing Quality Control

During OQC, boxes are opened at random and products are inspected before shipment utilising statistical process controls. These controls, such as Cpk analysis, measure in real time the performance of all manufacturing design processes.


Training and Certification

We achieve consistent manufacturing quality through proper employee selection and training. Employees are thoroughly trained and certified in the manufacturing process and procedures, and each employee is re-certified on an ongoing basis.


Elimination of repair and rework

Our company culture requires us to “do it right the first time.” We shut the line down if two failures in a process occur consecutively. We then identify and address the root cause before resuming production.


Customer Relationships

Product specification and definition

Detailed product specifications and terms are defined through mutual agreement with the customer, ensuring products meet customer needs exactly.


Root cause analysis

This is performed using failure tree and an 8D problem solving process to identify, correct and eliminate the recurrence of quality problems.


Customer Audits

We encourage our customers to audit and make recommendations on how to improve. We continue to learn and adopt the best practices.