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Question by bhalchandra
Submitted on 4/27/2004
Related FAQ: comp.software.testing Frequently Asked Questions (FAQ)
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what is the difference between verification & validation in software testing?

Answer by imran
Submitted on 6/11/2004
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verification and validation

Answer by Manish Agrawal
Submitted on 6/17/2004
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Verification means to check whether things are going on as per the given input and specifications. Validation means to test the product whether it works correctly in functional manner.

Answer by Nav
Submitted on 6/22/2004
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Verification - Are we doing the thing right? (Efficiency) Validation - Are we doint the right thing? (Effectiveness) Nav

Answer by Dhinakaran
Submitted on 6/23/2004
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verification is process of determining the degree to which the work product of given phase is satisfy the prior phase. validation is a process to verify that application is working properly according to the requirements.

Answer by Chang
Submitted on 7/3/2004
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What comes first and Why??? Validation or Verification

Answer by sangi
Submitted on 3/4/2005
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verification is conducted early in SDLC.It involves some reviews and meetings to evaluate the req, code,documents and specifications, (are we building the right system). validation is conducted at the end of development life cycle, It involves actual testing. (did we build the right system).

Answer by Buddy
Submitted on 5/19/2005
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Verification is the process of determining whether the system is in compliance with it's specifications. Validation is the process of determining whether the system will work in the "Real World"

Answer by Mayank M.
Submitted on 8/3/2005
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Verification is to check software workability. Validity is to get output from system for a valid input.

Answer by Venkat
Submitted on 8/24/2005
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Verification takes place before validation, and not vice versa. Verification evaluates documents, plans, code, requirements and specifications. Validation evaluates the product itself. The input of verification is checklists, issue lists, walkthroughs and inspection meetings, reviews and meetings. The input of validation is the actual testing of an actual product. The output of verification is a nearly perfect set of documents, plans, specifications and requirements

Answer by ajayporwal
Submitted on 8/31/2005
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Validation is done at development site and verification is done at client site

Answer by uday kumar
Submitted on 10/9/2005
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verification means whether the system is right or wrong. validation means whether this system is right system or wrong with respect to customer expectations.

Answer by Preeti
Submitted on 12/1/2005
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Verification ensures the product is designed to deliver all functionality to the customer. Validation ensures that functionality, as defined in requirements, is the intended behavior of the product; validation typically involves actual testing and takes place after verifications are completed.

Answer by beans
Submitted on 12/1/2005
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verification because it is beans to beans to beans

Answer by ivan
Submitted on 12/21/2005
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Verification:- It is doing Unit Testing on the product during initial or intermediate or final stages. Validation:- It is doing product testing where the entire product is ready and running and you are checking the entire functionality of the Product application.

Answer by asdf
Submitted on 5/30/2006
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the best definition i've seen is that verification makes sure product works as advertised to outside public; while validation makes sure product meets company's internal specifications.

Answer by Bex
Submitted on 7/9/2006
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AAAHHHH!!! Does this mean that, if I am doing ICT GCSE coursework on a website, my verification checks would be if what I have done agrees with the objectives prior to making it and the validation checks would be things like spell/grammar checks? (I need to know NOW!?!)

Answer by Anupam
Submitted on 11/20/2006
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Most Of people Say's,that,validation comes First,But my thinking is ,Verification Comes First and Then Validation,Because Until and unless i will Not Make Right Thing How We Can Use,That'sWhy Verification Comes First..

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Answer by RAQ
Submitted on 1/4/2006
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Verification: checking that the system/component (any work product) works in conformance to the requirements. Validation: checking that the system/component works in conformance to the requirements in its intended environment. Both are related to requirements, but validation focuses on the environment in which the system will be working.

Answer by Aruna
Submitted on 1/11/2006
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first verification comes then validation we can justify like this Verification is one which we test or verify during the Application is running Application means here Module Validation is one which we follows after the product is completed Product according to this collection of modules

Answer by abd
Submitted on 3/16/2006
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Verification is done upon the documents like F.S., R.S., CM Plan, Security Plan, Risk Plan, etc Validation is done upon the actual product/software so as to check the running of it according to the requirements. Now you can tell which one is done first.. rite?

Answer by ritu
Submitted on 3/29/2006
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adfasdf

Answer by Mohanasarat
Submitted on 5/11/2006
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Validation & Verification

Answer by Churchill
Submitted on 9/6/2006
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Verification is the process to confirm whether or not the final product fulfills all the initial requirements for it. Validation is the process to confirm that the final product works right or wrong.

Answer by rekha
Submitted on 10/5/2006
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verification Are we building the product right validation Are we building the right product

Answer by laxfaq
Submitted on 12/28/2006
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Verification - Checking the Credentials we have or not ( Check Employee have ID Card ) Validation - Checking the credentials that we have are right or wrong (Employee Scan ID Card and if right door opens )

Answer by VERIVAL
Submitted on 12/28/2006
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Q: What is the difference between verification and validation? A: Verification takes place before validation, and not vice versa. Verification evaluates documents, plans, code, requirements, and specifications. Validation, on the other hand, evaluates the product itself. The inputs of verification are checklists, issues lists, walkthroughs and inspection meetings, reviews and meetings. The input of validation, on the other hand, is the actual testing of an actual product. The output of verification is a nearly perfect set of documents, plans, specifications, and requirements document. The output of validation, on the other hand, is a nearly perfect, actual product

Answer by akshatha
Submitted on 3/29/2007
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Verification means set of activities that ensures the software that correctly implements the function. Validation means set of activities that ensures the software has been built is tracable to customer requirement.

Answer by prasad_tavva
Submitted on 5/9/2007
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Verification comes first. Then the validation. Verification is done at each level or step of the development process [reviews] Validation is done to your end product or code. [All kinds of testing] Refer http://www.buzzle.com/editorials/4-5-2005-68117.asp [Sorry for keeping unit testing and some other testing under Verification in my earlier note]

Answer by Mittar Bhardwaj
Submitted on 5/17/2007
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Verification comes before Validation because Verification evaluate Documents, plans, code, requirements and specifications. Validation evaluates the product. The product can be evaluated as per its specifications and it is expected that the product will be validated rightly if requirements, specifications are correct.

Answer by srini
Submitted on 5/18/2007
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Verification is the process of ensuring that the product(As a whole) which we are developing is right.For Ex: Reviewing the Work Products(Functional Specs,high level doc,Design Doc etc), reviewing the code(Static Methods)etc..... Validation is the process of ensuring that the product which we have built(Completed) is right and is as per the requirements and matches all the user requirements...