HavingDeveloping software that is free from faults is very difficult anddifficult. Most of the time, unforeseen deficiencies, unknowndeficiencies and unidentified bugs it will appear, ineven when most of the time evena team has carefully applied development methodologies. carefully, itIt is very important to predict the potential faults of any software, and to haveapply better planning and management for theof QA testing and maintenance of a project. FaultsFault prediction will give the development team more chances to applyexecute testing more one time over thethan once on modules or files havingfiles with high faults probability, this. This will lead to more focus more on the faulty modules. As a result of thatthis, the probability of fixingfixing the remaining faults wouldwill increase , theand any software products would be deliveredreleased to the end users will become more qualified,qualified. This approach also decreasedecreases the maintenance effortand support efforts for the project. Low quality of software may be obviouslytesting is often obvious.