Verification: process of evaluating steps which is followed up to development phase to determine whether they meet the specified requirements for that stage.
Validation: process of evaluating product during or at the end of the development process to determine whether product meets specified requirements.
Difference between Verification and Validation:
- Verification is Static Testing where as Validations is Dynamic Testing.
- Verification takes place before validation.
- Verification evaluates plans, documents, requirements and specifications, where as Validation evaluates product.
- Verification inputs are checklist, issues list, walkthroughs and inspection, where as in Validation testing of actual product.
- Verification output is set of documents, plans, specifications and requirement documents where as in Validation actual product is output.
Quality Assurance is a set of activities for ensuring quality in the processes by which products are developed.(Q.A)Quality Control is a set of activities for ensuring quality in products. The activities focus on identifying defects in the actual products produced.(QC)
Verification: Investigation if something is what it is supposed to be (e.g. in the case of a theory, if it is logically proper, or in the case of a product, if it fulfills the requirements)
Validation: Investigation if something does what it is supposed to do (e.g. in the case of a theory, what it is able to explain, or in the case of a product, what it is able to realize/perform)
Quality assurance is a proactive and reflective set of quality ensuring activities in a broader sense.
Quality control is reactive and reflective set of quality ensuring activities in a narrower sense, as also explained by Dr. Raju..
Quality Assurance: We define the processes, policies, strategies, establish standards, developing checklists etc. to be used and followed through out the life cycle of a software project.
Quality Control: We follow all those defined processes, standards and policies to make sure that the project has been developed with high quality and at least meets customer’s expectations.
Simple explanations:
Verification - Are we doing the THING RIGHT?
Validation - Are we doing the RIGHT THING?
Quality Assurance - PROACTIVELY assuring quality in PROCESSES FOR PRODUCT CREATION
Quality Control - REACTIVELY assuring quality in PRODUCT CREATED
Thank you very much for replying @suvarna raju sir. This information of yours is really helpful.
Thank you very much for replying Imre Horvath sir. This information of yours is really helpful. Also, thank you very much for your inputs.
Respected Fatih Yucalar sir,
thank you very much for your inputs.
Dear Peter Stoyanov Sabev sir,
Thank you very much for replying. This information of yours is really helpful.
Everything that was validated was verified, and not everything that was verified was validated.
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