Inspection Procedures
There are three ways of doing inspection. They are Floor inspection, Centralised inspection and Combined inspection.
1. Floor Inspection
It suggests the checking of materials in process at the machine or in the production time by patrolling inspectors. These inspectors moves from machine to machine and from one to the other work centres. Inspectors have to be highly skilled. This method of inspection minimise the material handling, does not disrupt the line layout of machinery and quickly locate the defect and readily offers field and correction.
Advantages
(1) Encourage co-operation of inspector and foreman.
(2) Random checking may be more successful than batch checking.
(3) Does not delay in production.
(4) Saves time and expense of having to more batches of work for inspection.
(5) Inspectors may see and be able to report on reason of faculty work.
Disadvantages
(1) Difficult in inspection due to vibration.
(2) Possibility of biased inspection because of worker.
(3) Pressure on inspector.
(4) High cost of inspection because of numerous sets of inspections and skilled inspectors.
Suitability
(1) Heavy products are produced.
(2) Different work centres are integrated in continuous line layout.
2. Centralised Inspection
Materials in process may be inspected and checked at centralised inspection centre which are located at one or more places in the manufacturing industry.
Advantages
(1) Better quality checkup.
(2) Closed supervision.
(3) Absence of workers pressure.
(4) Orderly production flow and low inspection cost.
Disadvantages
(1) More material handling.
(2) Delays of inspection room causes wastage of time.
(3) Work of production control increases.
(4) Due to non-detection of machining errors in time, there may be more spoilage of work.
Suitability
(1) Incoming materials inspection.
(2) Finished product inspection.
(3) Departmental inspection.
(4) High precision products of delicate products.
(5) Small and less expensive products.
3.Combined Inspection
Combination of two methods what ever may be the method of inspection, whether floor or central. The main objective is to locate and prevent defect which may not repeat itself in subsequent operation to see whether any corrective measure is required and finally to maintained quality economically.
