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