Now a days anything which we are using is dependent on any software. Software plays a very critical role in our lives at this point of time. Software is everywhere whether we talk, travel, study or doctors performs different tests or operations etc.

So, if it’s so important then it needs to be correct also, because it is affecting life of people in every way. Companies are investing major amount of their investment in R&D and making their product correct so that it provides the desired result. Assume if these software don’t work correctly, what will be its affect as it is used everywhere in health, security, transport, business etc. Companies know the ill-effect of using not correct software, so they are investing a particular amount in doing the proper testing of those software before it goes to people for use.