Skip to main content

Difference Between Verification and Validation

Verification and Validations are terms which induces confusion among software testers. Here in this post, we have tried to simplify the jargon and give you a clear picture of difference between Verification and Validation. We will take an example of car manufacturing process to distinguish between these two terms.
Before we delve deep into it, let’s understand that Verification and validation are independent procedures that are used together for checking that a product, service, or system meets requirements and specifications and that it fulfills its intended purpose. So, these two procedures go hand-in-hand to ensure system quality.
With this fundamental in mind now, let’s take an example of car manufacturing process. Once car is manufactured in assembly, it is tested in lab conditions and road conditions. Lab conditions verifies that car is made as per its design specifications and is working as expected. However, road conditions test will determine how car will be working in real time environment – its intended use. If you have guessed it by now, lab condition here is verification and road condition is validation. Here’s how.
As per Barry Boehm,
  • Validation: Are we building the right product? (This is dynamic process for checking and testing the real product. Software validation always involves with executing the code)
  • Verification: Are we building the product right? (This is static method for verifying design, code. Software verification is human based checking of documents and files)
In other words, validation ensures system meets its intended use(road conditions in our car example) by executing of code. While verification ensures system is built according to specifications(lab conditions in our car example) without executing code.
Now, let’s see what activities will be done in verification and in validation.
Activities in verification:
  • Review
  • Meeting
  • Inspection
  • Walkthrough
Activities in validation:
  • Black box testing
  • White box testing
Check out below image for visual illustration of difference between verification and validation.
Difference Between Verification and Validation
 
We hope the above article sheds some light about difference between verification and validation. Let us know how it goes for you in comments.
Labels:

Comments

Post a Comment

Popular posts from this blog

JMeter Exceeded Maximum Number of Redirects Error Solution

While running performance test, JMeter allows maximum 5 redirects by default. However, if your system demands more than 5 redirects, it may result in JMeter exceeded maximum number of redirects error. In this post, we have listed down steps to overcome this error. Actual error in JMeter: Response code: “Non HTTP response code: java.io.IOException” Response message: “Non HTTP response message: Exceeded maximum number of redirects: 5” This error is noticed because  JMeter  allows maximum 5 redirects by default and your system may be using more than 5 redirects. You need to increase this count to more than 5 in jmeter.properties file. Follow below steps to achieve this. Navigate to /bin directory of your JMeter installation. Locate jmeter.properties file and open it in any editor. Search for “httpsampler.max_redirects” property in opened file. Uncomment the above property by removing # before it. Change to value to more than 5 Eg. 20. Save the file and restart JMet...
Post a Comment
Read more

SSO with SAML login scenario in JMeter

SAML(Security Assertion Markup Language) is increasingly being used to perform single sign-on(SSO) operations. As WikiPedia puts it, SAML is an XML-based open standard data format for exchanging authentication and authorization data between parties, in particular, between an identity provider and a service provider. With the rise in use of SAML in web applications, we may need to handle this in JMeter. This step-by-step tutorial shows SAML JMeter scenario to perform login operation. First request from JMeter is a GET request to fetch Login page. We need to fetch two values ‘SAMLRequest’ and ‘RelayState’ from the Login page response data. We can do this by using  Regular Expression Extractor . These two values need to be sent in POST request to service provider. Refer below image to see how to do this. We will get an HTML login page as a response to the request sent in 1st step. We need to fetch values of some hidden elements to pass it in the next request. We...
Post a Comment
Read more

VBScript Code - Function to convert CSV file into excel and viceversa in QTP using VBScript

We at times are required to convert excel files into csv to read as flat files and sometime require to convert a csv file into excel file to use excel features on the data.   Below function shows how to convert an csv file into excel file and vice versa. We can also convert to other formats based on constants Here constant value 23 is used to create a csv file and constant -4143 to save a file as xls file. Once the destination file is created, we can delete the source file as shown below.  In case of any issue in understanding the code, please add in comment section Call func_ConversionCSVExcel("E:\Test.csv", "E:\Test_converted.xls", "csvtoexcel") Public Function func_ConversionCSVExcel(strSrcFile, strDestFile, Conversion) on error resume next Set objExcel = CreateObject("Excel.application") set objExcelBook = objExcel.Workbooks.Open(strSrcFile) objExcel.application.visible=false objExcel.application.displayalerts=...
Post a Comment
Read more