Sunday, July 5, 2009
Defect Removal Efficiency
In the recent past,IT projects are spending more time in arriving at 'defect prediction', 'defect detection', defect prevention' activities as this plays a key driver for the overall QUALITY of the product / project.
Out of this, defect removal efficiency is the one which is getting more important to the project teams as this is one of the measurement to assess the quality of the project team delivery.
The below is the formula that we normally use to calculate DRE (DefectRemoval Efficiency).
DRE =
Total Number of Defects in Dev + QA
________________________________________________ * 100
Total Number of Defects in Dev + QA + Production
This gives the % of DRE for the particular project. Different people have given different perspective on how to analyze the high quality based on the results.
But tokeep this very simple and straight forward, based on the readings of many references, I prefer going as per the below standards to arrive at the High quality measurements.
SEI-CMM Level 1 - 85%
SEI-CMM Level 2 - 89%
SEI-CMM Level 3 - 91%
SEI-CMM Level 4 - 94%
SEI-CMM Level 5 - 97%
This % may vary to some extent depending on the company / project goals. Ideally the above will be the reasonable numbers.If the software / product is being used by many clients, then we need to add one more parameter based on the client numbers.
Out of this, defect removal efficiency is the one which is getting more important to the project teams as this is one of the measurement to assess the quality of the project team delivery.
The below is the formula that we normally use to calculate DRE (DefectRemoval Efficiency).
DRE =
Total Number of Defects in Dev + QA
________________________________________________ * 100
Total Number of Defects in Dev + QA + Production
This gives the % of DRE for the particular project. Different people have given different perspective on how to analyze the high quality based on the results.
But tokeep this very simple and straight forward, based on the readings of many references, I prefer going as per the below standards to arrive at the High quality measurements.
SEI-CMM Level 1 - 85%
SEI-CMM Level 2 - 89%
SEI-CMM Level 3 - 91%
SEI-CMM Level 4 - 94%
SEI-CMM Level 5 - 97%
This % may vary to some extent depending on the company / project goals. Ideally the above will be the reasonable numbers.If the software / product is being used by many clients, then we need to add one more parameter based on the client numbers.
Friday, July 3, 2009
Business Operation Testing
In today’s testing world, one of the challenges is to convert the requirements into actual functional test cases (Manual and Automation) and to assure appropriate coverage. One way of dealing with this is involving the business analysts at the beginning of the test design stage till test case execution stage. This helps in achieving more coverage in terms of testing the desired business functionalities.
There is a way that business analysts can involve in the test case design and test data management. This process is called ‘Business Operation Testing’.
There is a way that business analysts can involve in the test case design and test data management. This process is called ‘Business Operation Testing’.
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