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Functions of inspectors and significance of their work

From time to time, factories had met with many professional inspectors, whose eyes present the traders and customers, they’re usually humbling on inspections, carefully check each product, compare markings and labeling with documents, make test for the sake of safe, and complete their reports overnight. So what is the role of inspector meaning to your business? And how they work out?

1. Guard of Product Quality

The most basic function of inspector is the gate for quality, which can also be called quality assurance. This function exists when inspection comes into being, whatever in the past time ornowadays, even in the future, in which with the highly developed automation of production, the means and technology of inspection more developed and changed, this function of inspection is still indispensable. The production of an enterprise is a complicated process, men, machine, material, method (4MIE) and other factors may change the state of production at any time, each process can not be in an absolute stable state, actually the fluctuation of quality characteristics exists objectively, so It is virtually impossible to guarantee 100% quality in each process. With the progress of technology and management, the workload of inspection may be reduced, but inspection still exists. Only through inspection, by means of non-commissioning of unqualified raw materials, non-sequencing of unqualified semi-finished products, non-assembly of unqualified components, and non-qualified products not passing off, can the quality of products be truly guaranteed.

2. Prevention of Abnormality

The main difference between current inspection and traditional inspection is that, inspection nowadays not only plays a checkpoint role, but also plays a preventive role. Generally speaking,   in most of factories, the inspection of incoming raw materials and purchased parts, and online inspection of preceding process, can play a preventive role in the production processafterwards, or the production of the next flow. In particular, the effect of preventive is also manifested in the below aspects:


Preventive action is taken through the determination of process capability and the use of control charts. As we all know, whether it is the determination of process capability or the use of control charts, it is necessary to obtain a batch or a group of data through product inspection, which can be achieved only after statistical processing. The purpose of this inspection is not to determine whether a batch or a group of products are qualified, but to calculate the capacity of the process and reflect the state of the production process. If it is found that the process capability is insufficient, or the abnormal state of the production process is indicated by the control chart, it is necessary to take timely technical measures to improve or eliminate the abnormality, so as to prevent the occurrence of unqualified products. Many facts have proved that the preventive effort of this kind is very effective.


Preventive action is taken through First Piece Inspection and In-Process inspection. When a batch of products or a shift begins into process, the first piece of product came out should be inspected thoroughly (the first piece inspection is not necessarily only one piece), once the first piece is qualified and approved, mass production continues. In addition, after each time of repair or readjust of production facility, the first piece inspection should also be carried out, the purpose of which is to prevent a large number of substandard products. After putting into mass production, in-process inspection take the place to find out whether the production process has changed in time, or whether there is the possibility of non-conforming products, based on regular or irregular spot checks. When problems are found, timely measures should be taken to correct them in order to prevent the occurrence of non-conforming products.

3. Evaluation of inspection report

Inspection report is also a kind of information feedback, this is to enable leaders and relevant quality management to grasp the status of production, evaluate and analyze the effectiveness of their quality system. In order to make correct decisions, it is important the inspection results can reveal the changes of quality and the existing problems, the inspection results must be feedback to decision-makers and relevant managements for their measurements, in form of reports, especially with calculated indicators. The main contents of the report should include as following:

1. In-coming inspection indicators, including qualification rate for raw materials, outsourced parts and sub-manufactured parts.

2. Out-going inspection indicators, such as qualification rate of ex-work, rework status, scrap rate, and loss amount.

3. Analysis in bar graphs, according to qualification rate, re-workable rate, scrap rate, loss amount loss, listed by each workshop and subgroup.

4. Analysis in bar graphs, reasons for product scrap.

5. Reports on disposal of nonconforming products

6. Reports on investigation, analysis and treatment of quality accidents.

7. Report of proposal on improving quality.

8. Other relevant reports

4. Quality improvement

Participation in quality improvement, is the key given to inspectors with full played role in quality control and prevention, as well as the concrete manifestation of inspection linked withquality, as inspectors are usually engineers or technicians with certain experience or professional proficiency at production process, they often work in the production site, and have deep understanding of the factors that affecting people, machines, materials, methods and others, as well as the acknowledgement of updated information of quality. Inspectors know more about quality than designers and technicians, so they can put forward with more practical suggestions and measures in quality improvement, especially when design, process, operation and inspection jointed together, can speed up the pace of quality improvement and achieve better results.