The purpose of inspection is to separate defective items or components from non-defective ones. Inspection ensures the quality of products. This builds up the reputation of firm in the market and hence no or less numbers of complaints from customers. Inspection can be done for raw material, in process material and final finished products. Apart from improving the quality of product it also helps in saving time and minimizing the cost of production.
Types of Inspection:
Floor Inspection: This type of inspection ensures identifying the errors when the manufacturing of product is in process i.e. before the final product is ready. The quality inspector on shop floor visits from machine to machine to check samples of the work of various machine operators.
Fixed Inspection: It is able to detect the defects after the job has been completed. The work is inspected by inspectors at intervals at a centralized place. This method is adopted when it is not possible to bring the inspection equipment and tools on the shop floor. This inspection avoids the direct contact of worker (machine operator) and inspector.
Key-point Inspection: Every component has a major point in its process of production. It is that point beyond which the component may not be able to rework or it require costly operation. This inspection helps in avoiding unnecessary further expenditure on poor quality components, which are likely to be rejected at final stage.
Final Inspection: Final inspection is done to check the product for its functional performance and appearance. Lots of destructive and non-destructive tests like radiography, x-ray, ultrasonic testing, fatigue testing, tensile testing etc are done to check the quality of final product. It is a centralized inspection for which special equipment and tools are required. It is the last chance to check defects in the products before they are dispatched to the customers.