is a suite of integrated software applications used to manage transactions through company-wide business processes,by using a common database,standard procedures and data sharing between and within functional areas.However,several surveys have shown that a hight percentage of ERP implementations are classified as failures.it is a complex and risky adventure.the failure factors are not well known,but they can possibly lead to real to real effects:many companies have failed in ERP projects.Among these enterprises,there are Mobile Europe,dell computer,Dow Chemical,which retread from the project.it is also possible for the project to lead to the bankruptcy of the company as the case of FoxMeyer Drug.According to the investigation conducted from September 2012 to January 2013,ERP often result in failure,53% of projects exceeded the budget set,61% exceeded the deadline and 60% realized less than 50% of expected benefits,another study called chaos manifesto conducted by Standish Group,shows that:21% of software projects are failed and abolished before they are completed or delivered but never used;42% of projects cost more than the expected estimate,exceed the schedules and / or shortage of features;37% of projects are completed on time and estimated costs.these failures are primarily caused by the absence of certain prerequisites that are necessary for the success of ERP implementation.