What is full inspection? What is the process and method of full inspection?

Full inspection, also known as full inspection (100% inspection), is a quality control method that inspects and checks the quality of each product one by one after the production is completed. Different from the sampling inspection that only selects part of the products for inspection, the key to full inspection lies in comprehensiveness, that is, not missing any product, so as to ensure that each product meets the design and quality standards.

The concept of full inspection is to minimize the product defect rate by strictly inspecting the final product. It is widely used in industries or application scenarios with extremely high requirements for product quality, especially when any unqualified product may bring huge safety hazards or economic losses.

Full inspection process and methods

The full inspection process can vary depending on the type, size, complexity and quality requirements of different products, but generally includes the following steps:

1. Preparatory stage:

Define product quality standards: establish clear standards and inspection indicators, such as size, function, appearance, etc.

Choose appropriate inspection tools or equipment: According to the characteristics of the product, choose appropriate inspection methods, such as visual inspection, dimensional measurement, functional testing, etc.

2. Inspection stage:

Each product must be inspected individually: No matter how large the production line is, each product must go through the same inspection process to ensure that each product meets the predetermined standards.

Data recording and traceability: The inspection results of each product usually need to be recorded for subsequent analysis and tracing of unqualified products.

Handling of defective products: Products that are found to be defective will be handled according to their classification: Generally, defective products will be repaired, reprocessed, or directly scrapped, depending on the severity of the problem.

Result analysis and improvement: Analyze the inspection data and provide feedback to customers so that adjustments and improvements can be made to quality problems encountered during the production process.

Common full inspection methods include:

• Visual inspection: Directly check the appearance or surface of the product for defects such as scratches, cracks, color difference, etc. through the naked eye or equipment such as a magnifying glass.
• Dimension inspection: Use calipers, micrometers, measuring instruments and other tools to check whether the product dimensions meet the requirements of the design drawings.
• Functional inspection: Test the functionality of the product by simulating actual usage conditions to ensure it can operate normally.

Advantages of full inspection

100% coverage: The biggest advantage of full inspection is that it inspects every product, eliminating sampling errors. All defective products can be discovered, thus preventing defective products from entering the market.

Higher reliability of quality control: Full inspection provides higher quality assurance than sampling inspection because every product is tested. This is especially important for high-value or high-risk products.

Reduce the risk of recalls and after-sales problems: Since each product has been inspected before leaving the factory, the probability of recalls or returns due to product defects is greatly reduced, thus saving the cost of after-sales service.

Enhance customer trust: For some special industries or customized products, customers often require products with high reliability

Comparison between full inspection and sampling inspection

Full inspection and sampling inspection are two different quality control methods, each with its own advantages and disadvantages:

Full inspection	Sampling inspection
Inspect all products	Only a portion of the products are tested
High cost and low efficiency	Low cost and high efficiency
Suitable for high-risk, high-value products	Suitable for mass production and products with general quality requirements
Inspection coverage 100%	There is sampling error, and defective products may be missed

Although full inspection is more expensive and less efficient, it is still the best choice to ensure product quality in some industries with extremely high quality requirements. By inspecting every product, full inspection minimizes the risk of product defects.

When the product is 100% completed, before or after packaging, the test warehouse will inspect the appearance, workmanship, function, safety and other checkpoints required by the customer at the full inspection factory or the location designated by the customer according to the customer's requirements, strictly distinguish good products from defective products, and report the inspection results to the customer in a timely manner.