Regression Testing Services Why Software Update Needs Regression Testing
                     Regression Testing Services : Why Software 
Update Needs Regression Testing?
What is Regression Testing?
Regression Testing services are described as a kind of software testing to make sure that the 
software update (change in program or code) has not introduced bugs in the software. 
Regression Testing is a collection of already completed test cases which are re-executed to 
assure existing features work fine.
Regression testing services ensure that new code changes should not have adverse effects on 
the existent functionalities. It ensures that the old code still works once the latest code 
changes are done.
Regression Testing is required when there is :
        
• Variation in specifications and code is modified according to the demand
• The new characteristic is added to the software
• Bug fixing
How to do Regression Testing
Software support is an exercise which involves improvements, error corrections, optimization 
and deletion of existing features. These changes may cause the system to work inaccurately. 
Hence, Regression Testing becomes essential.
Regression Testing can be carried out using the following methods:        
Retest All
This is one of the ways for Regression Testing in which all the tests in the existent test bucket 
or set should be re-tested. This is very costly as it requires enormous time and resources.
Regression Test Selection
• Instead of re-testing the entire set, it is better to pick the part of the test suite to be run
• Test cases picked can be classified as 1) Reusable Test Cases 2) Obsolete Test Cases.
• Re-usable Test instances can be used in reducing regression cycles.
• Obsolete Test Cases can’t be used in succeeding series.
Prioritization of Test Cases
Prioritize the test cases depending on business impact, significant & generally used 
functionalities. Choice of test cases based on priority will significantly reduce the regression 
test suite.
Choosing test cases for regression testing
It was discovered from industry data that a significant number of the bugs reported by 
customers were due to last-minute bug fixes results. Hence, picking the test case for 
regression testing is an art and not that simple. 
Effective regression tests can be performed by picking the following test cases –
• Test cases which have various defects
• Functionalities which are more noticeable to the users
• Test cases which support core characteristics of the product
• Test cases of Functionalities which has experienced significant recent changes
• All Integration Test Cases
• All Difficult Test Cases
• Boundary preference test cases
• A sample of Successful test cases
Regression Testing Tools
• If your software experiences constant changes, regression testing costs will increase.
• In such cases, Manual performance of test cases grows test execution time as well as 
costs.
• Automation of regression test cases is the smart choice in such cases. 
• The extent of automation depends on the fraction of test cases that remain re-usable for 
continuous regression cycles. 
Following Are The Essential Tools Used For Both Functional And Regression Testing In 
Software Engineering:
Ranorex Studio — It is an all-in-one regression test automation tool for both web and 
mobile apps with built-in Selenium WebDriver.
Quick Test Professional (QTP): HP Quick Test Professional is automated software created to 
automate functional and regression test cases. It uses VBScript language for automation. It 
is a Data-driven, Keyword-based tool.
Regression Testing and Configuration Management: Configuration Management during 
Regression Testing enhances necessary Agile Environments where code is modified 
continuously