Quality Control & Quality Assurance.

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Quality Control & Quality Assurance

Quality control and Quality Assurance are very different even though their ultimate objective is the same – to provide a guarantee of product quality to the end user.  The difference perhaps best illustrates by showing how attitudes to quality have changed.  

Quality Control is an inspection process in the production process.

Quality Assurance is based on the concept that quality is the responsibility of everyone working in the business.  

Quality could be described as those features of a product or a service that allows it to satisfy consumer wants.  Quality control is concerned with ensuring products:

Physical appearance

Reliable and durable

Special features

Suitable

After sales service

Image

Reputation

Parts

I would make sure that my business’s quality control involves inspection of output to ensure that it meets the quality standard with satisfactory output being passed, unsatisfactory output being rejected and, maybe, re-worked or just scrapped.  While this approach may result in customers receiving satisfactory products there are a number of disadvantages.  

Inspection is most likely to find all the faulty items because the normal inspections procedure is to simple say 10% of the output.  If the 10% is satisfactory the rest is assumed to be.  Obviously, if I sample, I can never be 100% sure the rest are satisfactory, even if I do check every item faults will still slip through.  Cost of this can be very high.    

Quality Assurance is based on the idea that quality is everybody’s responsibility.  There are saying that you ‘can’t inspect quality into a product’.  I may be able to inspect faults out, but you can’t inspect quality in.  

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The importance is on trying to ensure goods are produced free of faults.  Quality assurance is based on the belief that if everybody involved in the production of that product is really committed to ensuring faults are eliminated, they can be.  So you do not try to inspect faults out; you make sure they are not there in the first place.  The involvement of everybody in the organisation is crucial; quality is not just the responsibility of the quality control department – it is everybody’s.

Businesses are increasingly taking into account the needs of customers.  Quality Assurance is ...

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