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Defect seeding is a technique that was developed to
estimate the number of defects resident in a piece of software. It’s a bit
offline technique and should not be used by every one. The process is the
following we inject the application with defects and the see if the defect is
found or not. So for instance if we have injected 100 defects we try to get
three values first how many seeded defects where discovered, how many were not
discovered and how many new defects (unseeded) are discovered. By using defect
seeding we can predict the number of defect remaining in the system.
Figure: - Defect seeding
Let’s understand the concept of defect seeding by doing
some detail calculation and also try to understand how we can predict the number
of defects remaining in a system. Below is the calculation for the same.
- First calculate the seed ratio using the below given
formulae i.e. Number of seed bugs found divided by total number of seeded
bugs.
- After that we need to calculate the total number of
defect by using the formulae Number of defects divided by seed ratio.
- Finally we can know the estimated defects by using the
formulae Total number of defects – Number of defect calculated by step 3.
Below figure shows a sample with step by step calculation.
You can see first we calculate the seed ratio, then total number of defects and
finally we get the estimated defects.
Figure: - Seed calculation
If you want to buy the project management book mail
[email protected] for
more details or call any of our book shops MUMBAI-22078296/97/022-22070989,
KOLKATA-22826518/19 HYDERABAD-24756967,24756400,BANGALORE-25587923,
25584641,AHMEDABAD-26421611,BHATINA(PUNJAB)-2237387,CHENNAI-28410796,28550491,DELHI/NEWDELHI-23254990/91,23325760,26415092,24691288.If
you want to write to the author directly email at
[email protected]
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