Quality Assurance Quality Control Definition QA is a set of activities for ensuring quality in the proc...
Quality
Assurance
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Quality
Control
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Definition
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QA is a set of activities for
ensuring quality in the processes by which products are developed.
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QC is a set of activities for ensuring
quality of products. The activities focus on identifying defects in the
actual products produced.
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Focus on
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QA aims to prevent defects with a
focus on the process used to make the product. It is a proactive quality
process
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QC aims to identify (and correct)
defects in the finished product. Quality control, therefore, is a reactive
process.
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Goal
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The goal of QA is to improve
development and test processes so that defects do not arise when the product
is being developed.
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The goal of QC is to identify defects
after a product is developed and before it is released.
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How
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Establish a good quality management
system and the assessment of its adequacy. Periodic conformance audits of the
operations of the system.
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Finding & eliminating sources of
quality problems through tools & equipment so that customer's
requirements are continually met.
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What
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Prevention of quality problems
through planned and systematic activities including documentation.
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The activities or techniques used to
achieve and maintain product quality, process, and service.
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Responsibility
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Everyone on the team involved in
developing the product is responsible for quality assurance.
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Quality control is usually the
responsibility of a specific team that tests the product for defects.
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Example
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Verification is an example of QA
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Validation/Software Testing is an
example of QC
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Statistical Techniques
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Statistical Tools & Techniques
can be applied in both QA & QC.
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When they are applied to processes
(process inputs & operational parameters), they are called Statistical
Process Control (SPC); & it becomes the part of QA
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When statistical tools &
techniques are applied to finished products (process outputs), they are
called as statistical Quality Control (SQC) & comes under QC
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As a tool
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QA is a managerial tool
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QC is a corrective tool
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Orientation
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QA is process-oriented
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QC is product-oriented
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