Asia Quality Focus, InTouch Quality
Topics: Quality Control (QC), QC Checklist, Inspection
Quality control (QC) staff uses a quality control checklist to inspect a product. The QC checklist act as a guide for inspectors during inspection. The checklist includes product requirements, on-site testing, packaging, and more details. Five main ways inspectors use the QC checklist in the field:
- Pulling a random sample. QC checklists specify the number of units an inspector should randomly pull into a sample. Using the correct sample size ensures that the results represent the quality and status of the total shipment. However, pulling too many into the sample increases the time, raising costs if inspectors are billed based on time. If inspectors pull too few into the sample, it limits the inspection scope, increasing the likelihood that they may overlook the defects and other issues.
- Checking the product against specifications. Inspectors may use the checklist to verify many specific characteristics related to the product. For example, they could check the weight, dimensions, material, construction, color, markings, and labeling on the product. Any product requirements omitted from the checklist would not be checked during the inspection.
- Verifying packaging requirements. The QC checklist is also used for checking the product packaging. Characteristics such as appropriate cardboard type, packing, assortment method, and packaging labeling are essential checks. If not labeled correctly, it can lead to products being damaged when in transit or denied at customs.
- Classifying and reporting quality defects. QC inspectors classify defects as critical, major, or minor. Referring to the QC checklist can help organize and report defects. Tolerance for severe defects would probably be lower than for less serious ones. There is a chance of inaccurate results if inspectors incorrectly group the defects found.
- Performing on-site product tests. Products require on-site testing to determine if they meet safety, performance, and function requirements. Following the QC checklist can help determine which tests to conduct, the procedures and equipment needed, and the pass or fail tolerance for each test. Inspectors following incomplete checklists are likely to perform testing incorrectly or misinterpret the result.
Inspectors rely on the QC checklist for relevant instructions for checking products. If used effectively, a QC checklist can lower costs by preventing unnecessary repeat inspections and catching quality defects before the shipment leaves the factory.