QA: Quality Assurance is the process which are having their eyes on the process to provide the assurity of the quality. like doing the testing at the time of development, giving the review comments and forced the developers to fixed the defects of the requirement, designed, coding and testing phase is the Quality Assurance.
Quality Control: Before delivering the product to make sure that all the documentation are provided, product has meet with the requirement criteria, all the SDLC phase are met with the exit criteria is the Quality control.
| Quality Control | Quality Assurance | | Definition | QC is about checking at the end of some development process (e.g. – a design activity) that we have built quality in i.e. that we have achieved the required quality with our methods. | QA is about having an overall development and management process that provides right environment for ensuring quality of final product. | | Description | QC is like testing a module against requirement specification or design document, measuring response time, throughput etc. | QA gives us added assurance that the whole producing or checking process is properly planned and executed and thus maintaining high quality. | | What it does | To check that the modern methods of software development are largely designed to ensure right quality is achieved. QC checks that these methods are in place and to discover where they are not then corrections are to be made. | It gives us added assurance that the while producing / checking process is being properly planned and executed and hence is keeping high our chances of producing software of required quality. | | Stages | Define features and levels Define feature check procedure Carrying out the check procedure Record the result take and record any corrective action taken. | 1. Determination of quality policy through Quality Management System 2. Checking that predetermined Quality control activities are being properly taken care off. | | Best carried out on | QC is best carried out on products | QA is best carried out on process. | | Phase of implementation | QC should take place at every stage of SDLC. | QA should be done at end of every SDLC i.e. when product building is complete. | | Technique | Structured walkthrough, Fagan Techniques are some of QC techniques. | Quality policy defined and generally implemented in the form of Quality Management System is used to carry out QA. |
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As per ISO 9000 Standards:
Quality Control means – The Operational Techique and activities that are used to fullfill requirements of Quality,
Quality Assurance means – All Those planned and systematic activites implemented already , to provide adequate confidence that an entity will fulfillrequirements of Quality.
The following table can explain in detail:
QC QA
Product Process
Reactive Pro-active
Line Function Staff Function
Find the defects Prevent the defects
e.g.
QC QA
Walkthrough Quality Audit
Testing Defining Process
Inspection Selection of tools
Checkpoint Review Trainings
