Inspection Procedure

The steps in the inspection carry out on an individual item; such like part, sub-assembly or ultimate product are as follows:

Presentation

The item is presented for evaluation.

Examination

The item is verified for non-conforming features. Measurement of a dimension or other attributes of the product or part are examined, while inspecting the variables.

Decision

It is depend on the evaluation, a decision is made whether the item adhere to the defined quality standards. The easiest case involves a binary decision, in which the item is deemed either unacceptable or acceptable.

Action

Action must be taken based on the decision to accept or reject the item, or sort the items to the most suitable quality grade.

In the past few decades, massive growth has occur in the sensor & computer technology and this resulted in the wide ranging acceptance of automated inspection systems for the maintenance of strict quality standards. Naturally, emergence of automated inspection system has put the manual inspection process in the back seat because of advantages felt by the industries in terms of accuracy & time saving. In some of production situation, inspection process is applied only to one item (for example a one of a kind of machine or a prototype). In mass & batch production system, either inspection of entire lot is done (called screening) or a sample is taken from a lot (sampling inspection). While only one item or few samples are inspected, it is manually done whereas for the mass production, automated systems are utilized for 100% inspection.

It is time consuming and expensive task to inspect all the specified dimensions and attributes of the parts. Assured dimensions and specifications are imperative in terms of assembly or function of the product and are called key characteristics (KCs).