Hi all
In our company we are calculating Defect Removal Efficiency for the testing phase.So we will be comparing the Defect Removal efficiency for each round of testing.
Defect Removal Efficiency in Round 1=Defects found in round 1/Defects found in Round 1+ Defects found in Round 2.
In doing so for each phase I will be getting regression issues(which are caused by the developer).So if I put those issues also the efficiency of the testers will be reduced.
Any Solution??
Solution to what?
Your company has decided to collect data for a metric, for some reason.
That metric won't change your testers' efficiency, unless they are spending too much time collecting the data for the metrics.
Has management told you to do anything differently than you are already doing? If not, just carry on as before.
Without agreeing or disagreeing with Joe's comment above, there is a data point you can collect although it won't easy and it will certainly add overhead to your process.
For each bug detected you will surely report the phase where it was introduced, either by tracing back date ranges or simply by adding a field called something like "detected on phase". You can also add a field that is filled by the developer whenever he understands the issue called something like "entered on phase" where he will try to trace back the change that caused this issue.
Then you can calculate:
Defect Removal Efficiency in Round 1 =
Defects found in round 1/[Defects found in Round 1 + (Defects found in Round 2 - Defects found in Round 2 entered in Round 2)]
If you ask me, this is at least a partial waste of time (you would learn more by investing this time in writing down even a partial root-cause-analysis); but then again this may be out of your influence zone.
In any case, you asked for a solution and this is mine...
This is a really interesting question. Not that I know the answer, sorry! But I did think, perhaps the reintroduced bugs should be included in your effectiveness metrics (i.e. leave your original formula as it is) - as your testing has been effective twice, in finding them twice.
Plus, the number of reintroduced bugs should be reported elsewhere.
Interested to hear more thoughts on this. This is a metric I would like to report in my company (when we are sophisticated enough to start recording defects properly, on all projects).
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