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Scott Cravens

on 12 April 2011

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Transcript of Quality

Quality What is... What are "stated needs"? Requirements What are "implied needs"? So, to say something is a 'quality' product is to say it meets requirements
and is fit for use. 'Meeting requirements' is from the Producer's
perspective. 'Fit for use' is from the Customer's perspective. If product functionality meets all stated requirements, does
that mean it is 'fit for use'? Why? There are two gaps that exist that create the lack of quality. The first gap is between what was specified and what was delivered. This is called the 'Producer Gap'. The second gap is between what was delivered and what was wanted. This is called the 'Customer Gap'. The job of Quality Assurance (QA) is to try and reduce those two gaps. Thus, it can be said that QA is an activity that establishes and evaluates the processes that produce a product. Common QA activities:

o Establish processes
o Process improvement
o Training
o Analysis What about testing? Testing is a Quality Control (QC) activity. QC can be considered a subset of QA and is centered around comparing product functionality to requirements and established standards. Common QC activities include:
o Writing and executing tests
o Reporting defects QA is the set of activities that work to prevent defects.
QC is the set of activities that work to detect defects. How is quality measured? The following are commonly accepted attributes of quality and are used to measure the level of quality in a product: o Correctness
o Efficiency
o Flexibility
o Integrity
o Interoperability o Maintainability
o Reliability
o Reusability
o Testability
o Usability Bring me a rock.
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