Quality Control Inspection

Quality Inspection:

Quality Inspection are measures aimed at checking, measuring, or testing of one or more product characteristics and to relate the results to the requirements to confirm compliance. This task is usually performed by specialized personnel and does not fall within the responsibility of production workers. Products that don't comply with the specifications are rejected or returned to improve.

Origins of Quality Inspection:

Quality Inspection is the first stage of evolution of quality approach. Quality wasn't up to speed with rapidly increasing labour productivity. Often, the customer had to reckon with defective products. To alleviate customer frustration, this problem was solved by replacing the defective product with a new one. Conducting this type of procedure entailed generating considerable cost. To reduce the excessive cost escalation manufacturers introduced controller position, unknown to craft. The designated employee, through carried out inspections, made sure that the greatest possible number of good products leave the gate of the factory. This initial form of quality inspection based on the principle of quality by sorting.

The Scope of Quality Inspection:

Organization which uses quality inspection, treats inspector as if he was a customer. The optimum form of quality inspection is the man who's aim is the best customer satisfaction. Quality inspection serves three main purposes:

1.    Identification of the quality problem

2.    Provision of information to managers

3.    Elimination of the problem by managers

Quality Inspection can be performed at the end of production process (Final Inspection) or at several stages of the production (Intermediate Inspection).

Quality Inspection vs. Quality Control:

Quality Inspection is concerned on postoperative or post-production check of products. It doesn't have direct impact on production process. Quality Inspector only sorts products, and he doesn't let poor quality products to leave the factory. Quality Inspection has no feedback loop. That means that information about failures and their causes is not passed to workers or managers. Therefore, this system cannot improve itself.

Quality Control is the next stage of quality approach evolution. In that approach there is a direct connection between quality inspector and workers. Tests should not only distinguish bad products from good, but also find the cause of problems. This information should be sent to managers, as well as workers, who can then improve the process. The sub-stage of quality control is statistical quality control, known also as statistical process control. Quality control is a one feedback loop system. Information is passed to workers, who can try to improve their work, but not to change system or product.