Most computer applications, from consumer software to systems that control communications networks, are so complex that it is virtually impossible to produce program without errors, there are various mistakes, problems and failures human actions which have the power to fix and also been imperfect and make mistakes and other factors responsible for them for example a bank employee forgets to enter a command that would have posted direct deposit to customer account, what are several potential consequences of this error?
Many customers are inconvenienced, or they may feel been scammed out of their money. The bank may lose customers and can cost the bank billions of dollars. Computer is very complex. so it is very essential to follow good procedures and professional practice for their use