Page 115 - CITS - Fitter - Trade Theory

FITTER - CITS

5 It helps to purchase a good quality of raw material, tools, equipment which governs the quality of the finished
product.
6 It helps to coordinate the functions of quality control, production, purchasing, and other departments of the
organization.
7 To take decisions on the defective parts.
Purpose of Inspection:

1 To distinguish good lots from bad lots
2 To distinguish good pieces from bad pieces.
3 To determine if the process is changing.
4 To determine if the process is approaching the specification limits.
5 To rate the quality of the product.

6 To rate the accuracy of inspectors.
7 To measure the precision of the measuring instrument.
8 To secure products – design information.
9 To measure process capability.

Stages of Inspection:
1 Inspection of incoming materials:
It is also called receiving inspection. It consists of inspecting and checking of all the purchased raw materials
and parts that are supplied before they are taken on to the stock or used in actual manufacturing. The inspection
may take place either at the supplier’s end or at the manufacturer’s gate. If the incoming materials are large in
quantity and involve huge transportation cost it is economical to inspect them at the place of vendor or supplier.
2 Inspection of the production process:
The work of inspection is done while the production process is simultaneously going on. Inspection is done
at various work centers of men and machines and at the critical production points. This had the advantage of
preventing wastage of time and money on defective units and preventing delays in assembly.
3 Inspection of finished goods:

This is the last stage when finished goods are
inspected and carried out before marketing to see that poor quality products may be either rejected or sold at
reduced prices.

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CITS : CG & M - Fitter - Lesson 16