A study of the Computer system demonstrated that 62,5 % of companies or establishments consider their projects of renewal or acquisition of ERP as rather unsatisfactory. The main reasons of this important dissatisfaction are the following ones (they can be accumulated ):

• Needs, expectations or badly defined objectives (18 %)
• The deficit of implication of the adequate management (11 %)
• Badly prepared or badly driven projects (8 %)  
• Unsuitable features, over or under sized (16 %)  
• Users insufficiently associated to the project (9 %)
• Badly defined commitments, partially or in no way respected by the suppliers ( absent features) (13 %)
• Human resources and\or budgetary resources qualitatively and\or quantitatively insufficient (12 %)
• Technologies missing reliability or difficult to master (10 %)
• The strategic dimension of the project insufficiently qualified and discerned (4 %)
  

The selection and the evaluation of solutions P.G.I. is a complex process because, among others, of:

• The difficulty defining the precise needs of the company and translating them into terms of features and performances.
• The difficulty estimating the adequacy of a P.G.I. and services associated with the real expectations of the company: it requires the detailed analysis of hundreds or even thousand functional and technical criteria.
• The difficulty comparing the advantages of the various possible solutions PGI.
• The difficulty to fear the risks taken in case of compromise (because finally none of the solutions is really ideal).
• To define clearly the strategic and operational objectives of the project.
• To express exactly and objectively the true functional needs.
• To estimate methodically all the possible solutions.
• To make sure of the strong support of the appropriate levels of management.
• To remain independent and objective whatever is the stage of the process.
• To fear the political stakes and to manage the conflicts of interests