1. How much is Enuf?! – A Risk Based Layered Regression Test Strategy
Shaily Muker and Gulshan Yadav, Senior Quality Specialist
SAP LABS India Pvt. Ltd.
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2. Abstract How much should we test in regression – always a challenge!
As the product gets enriched with new features/enhancements, the functional test cases also keeps on adding to the existing test catalog. Risk Based Layered Regression Test Strategy(RBT) thus comes as an aid for this problem statement. It uses risk based approach to prioritize tests during regression test execution. RBT template calculates risk based on factors like Impact for Customer, Criticality, Security, Defect Containment etc. As all the critical functions of the application gets tested, it improves the overall quality of the product.

3. RBT provides two methods to access the risk value:
Option 1. Using a calculation schema via defined KPIs
Option 2. Direct assertion of an impact and probability factor

4. Regression Test Scope before RBT Regression Test Scope After RBT
Case Study
Testcase Priority
Regression Test Scope before RBT
Regression Test Scope After RBT
Very High(P1) 75 6
High (P2) 87 48
Medium (P3) 10 78
Low (P4) 3 30
Very Low 13

5. RBT Template - Benefits Realized
The approach helps in deriving the critical functionalities of the application with respect to different quality measure and risk factors
As all the critical functions of the application are tested, it makes a high impact on the overall quality of the business software
Helps in layered recommendation of different testcases priorities based on the nature of test or Focus of Automation
In case of limited resources (time or team), it helps as a negotiating tool for prioritization
Helps make testing a better planned and organized activity

6. References:
SAP Internal

7. Author Biography
Shaily Muker is a Senior Quality Specialist with around 9 years’ experience in testing SAP functional areas of ERP Human Capital Management.
Gulshan Yadav is a Senior Quality Specialist with around 9+ years’ experience in testing SAP functional areas of Business Suite.

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Thank You!!!
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