The purpose of establishing a quality control system is not only to ensure the product quality and gain the trust of a customer, but also to help control the process, increase efficiency and prevent any mistakes from occurring. A good quality control system is an insurance of success.

The following procedures were created under this philosophy.

Foundation

The TRS Quality Control System is structured around the following seven foundations:

1. Inspection Specification and Standard
   Used for defining product specifications, quality requirements, and inspection standards.
2. Inspection Documents and Records
   A system used to organize all forms that are required during an inspection and to manage inspection records for future reference.
3. Training
   Trains employees to become knowledgeable in executing all necessary quality procedures.
4. Problem Report and Corrective Action
   Assists employees to find actual reasons for a problem, providing a solution, and preventing reoccurrences.
5. Organization and Flow Chart
   Used to operate systems in conjunction, providing for greater efficiency and output.
6. Vendor Survey and Quality Monitoring
   Ensures that the quality control of any vendor is always under TRS monitoring before and after any purchases.
7. Links to Other Departments
   Acts as communication between departments such as quality control, engineering, accounting, shipping and receiving, equipment/ instrument maintenance, inventory control, RFQ processing system.

Checkpoint

TRS Quality Control Systems are carried out through the following four major checkpoints.

1. Incoming Quality Control (IQC)
   Assures components, materials, and received products from suppliers meet TRS quality standards. This is the first line of quality control, preventing poor quality materials from entering the company’s system from the beginning.
2. In Process Quality Control (IPQC)
   Monitors process and controls quality during manufacturing. This is the second line of quality control, allowing TRS to realize a problem just after it occurs.
3. Final Quality Control (FQC)
   Checks quality just before packaging, in the final assembly stage, to ensure that correct function and appearance meets the TRS quality standard. The third line of quality control, assuring a quality product from the moment of production.
4. Quality Assurance (QA)
   Double checks the inspection procedure which attempts, as a final line of quality control, to minimize defects in a product to zero.

Coverage

Different products require different levels of inspection, depending on risk, complexity, influence, and other considerations. TRS defines the degrees of inspection by the following levels:

1. First Article Inspection
   Only checks one sample to ensure the specifications meet the requirement. Usually, the inspection procedure concentrates on the function, dimension, and specification details of the product. This is an effective method to ensure that all components in a product combine to create a correctly built product.
2. Average Quality Level (AQL) Inspection
   Used primarily as a double-checking procedure for a general sense of correct appearance, function, and workmanship in vendor or TRS production line products. This ensures quality. A reasonable amount of samples are inspected in this procedure and the acceptance of the lot is dependent on the acceptance of the samples. This method ensures that a product’s quality stays at least on a satisfactory quality level, even if a problem is not identified during a previous inspection procedure.
3. One Hundred Percent Inspection
   This procedure is usually carried out during the IPQC and FQC stage of inspection. All production pieces are thoroughly checked for errors before finalizing and packaging. This has been integrated to become part of the production process and is what TRS believes is required to achieve total quality control.