In the past article, we saw information regarding failures in software testing. As far as today’s article is concerned, we are going to see the cost of defects. It is a very important factor to consider in the software testing process.
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First of all, we will see the definition of a defect. This will enable us to understand the cost of defects in a better manner.
What is a defect?
A defect is nothing but a deviation or variation from the expected result. When the original business requirements are not met, it leads to a defect. In other words, when the expected results do not match with the actual results, a bug arises.
The cost of defects can be measured by the impact caused by the defects and when we discover them. Prior the defect is discovered, lesser is the cost of it. For instance, if an error is found in the requirement specifications, then it is to some degree cheaper to resolve it. The rectification to the requirement specifications should be possible and afterward it can be re-issued. Similarly, when an error or a defect is found in the design, then the design can be rectified and it can be re-issued. In any case, if the error is not gotten in the specifications and is not found till the client acknowledgment then the cost to resolve those errors or defects will be much excessively costly.
The sooner the better! Is the mantra that is associated and should be followed with the cost of defects. Never forget it!
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On the off chance that the error is made and the resulting defect is recognized in the requirements stage then it is moderately cheap to resolve it.
Also if an error is made and the resulting defect is discovered in the design stage, then the design phase can be revised and reissued with moderately little cost.
The same applies for the developmental stage. Assuming in any case, a defect is presented in the requirements specification and it is not recognized until acceptance testing or even once the system has been executed then it will be a great deal more costly to fix. This is on the grounds that rework will be required in the specifications and design before changes can be made in the development phase; since one defect in the requirements may well proliferate into a few places in the design and code; and in light of the fact that all the testing work done-to that point will need be repeated with a specific end goal to achieve the confidence level in the software that we need.
It is regularly the case that defects distinguished at a later stage, contingent upon how genuine they are, are not amended in light of the fact that the cost of doing as such is excessively costly.
Likewise, if the software is released and meets an agreed upon specification, it infrequently still won’t be acknowledged if the specification wasn’t right. The team working on the project may have delivered precisely what they were asked to convey, however, it is not what the client needed. This can prompt end users being not happy with the software that is at long last delivered. Now and again, where the defect is way too serious, the system may have to be de-installed totally.
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