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Inspection refers to the process of meticulously examining an object according to established standards and characteristic requirements, using methods such as measurement and testing. In general, the core purpose of inspection is...Improve and stabilize quality。

In the manufacturing industry, inspection is typically used to check production results and process outputs to determine whether products meet the quality standards set by the company or customer. The following will discuss...Scope of inspection, working methods, purpose and benefits, types of inspectionThis will be explained in terms of aspects such as...

Inspection Scope

In manufacturing, the scope of inspection work typically covers from...Supplier materialsarriveFinished product shipmentA full-process quality assessment is conducted to ensure that the final product meets established standards.

In practice, inspection work is generally divided into two categories:

• Incoming Quality Control (IQC)
  Responsible for inspecting and accepting incoming materials from suppliers, purchased parts, and some semi-finished products to prevent defective materials from entering the production process.

• Outgoing Quality Control (OQC)
  Responsible for inspecting completed products to ensure they meet quality requirements before shipment.

How Inspection Works

The basic working method of inspection is:The key characteristics of the product are measured or tested in accordance with the standards.Then determine whether it meets the requirements.

The inspection process typically also includes:

1. Identify and isolate non-conforming productsProducts that do not meet the standards should be labeled, zoned, and isolated to prevent them from being mixed with qualified products.

2. Tracing and analyzing the causesInvestigate and analyze the root causes of nonconformities (this step is often completed collaboratively by the engineering, production, or quality improvement teams).

3. Handling and CorrectionNon-conforming products should be rejected, reworked, repaired, or scrapped, and the responsible departments should be urged to take corrective and preventive measures to reduce the recurrence of such products.

Through the above mechanisms, inspection has become one of the common means for manufacturing enterprises to ensure product consistency, stability and compliance.

Purpose and Benefits of Testing

Common purposes for companies to conduct inspections include:

1. Discovery of raw material defects
   Identify incoming material issues before putting them into production to prevent defective raw materials from entering the process and causing greater losses.

2. Identifying defective or low-quality products
   Timely detection of production defects reduces the number of defective products reaching customers.

3. To prevent quality problems from escalating
   Provide early warnings and feedback to management before problems escalate, enabling them to take corrective measures as soon as possible.

4. Reduce delivery delay risk
   Quality issues often lead to rework, repairs, and re-inspections. Early inspection can reduce delivery delays caused by these issues.

5. Improve quality and reliability
   By continuously testing and feedback loops, we can improve product quality and maintain stable and reliable performance.

Specific benefits of inspection activities for quality control

• Assess product quality levelTo understand the current status and trends of product quality through systematic testing.

• Distinguishing between qualified and unqualified productsTo achieve effective diversion and avoid mixing and mis-dispensing.

• Confirm whether the process is close to the specification boundary.To understand whether the production process deviates from or approaches the upper/lower limits of the specifications.

• Verify the accuracy of measurement toolsThe inspection process helps identify measurement deviation risks and improves measurement reliability.

Six common types of inspection

1. Floor Inspection
   Inspections are conducted during the production process to examine raw materials, semi-finished products, etc.; this may also include observing the condition of equipment and the operation of personnel in order to identify potential problems before mass production is scaled up.

2. Centralized Inspection
   Testing and judgment are carried out centrally in a fixed inspection area, and the products, equipment or measuring instruments to be inspected must be sent to the inspection point in a unified manner.

3. Combined Inspection
   Combining on-site inspection with centralized inspection, it takes into account both immediacy and systematicness.

4. First and Pilot Piece Inspection

• First article inspectionConfirmation is required for the first piece of a product after a batch change, line change, or mold change.

• Prototype InspectionIt is often used in the new product or new process stage to verify the prototype.