Many well-known business book authors and CEO of corporations have elaborated their ideas regarding the importance of each employee’s team work ability. I would like to raise a question in this article regarding employee treatment in team. People differentiation is a process required from managers, in which employees are categorised according to their performance. Employees with very good performance (successful), in first category, counting for 20 % of the total number. Employees with average performance, in second category, counting for 70 % of the total number. Employees with bad performance, in the third one, who should be replaced. Classifying employees, is not made with the only purpose of identifying performance, but also for decision taking reasons. It is fair to ask if different treatment demotivates team work. Majority of people are inclined to consider this as a division in 2 groups: strong and week, powerful and fragile, winners and losers. But this way of thinking it’s not right. It is based more on power than in principles. Single function and cross functional team are wide spread forms of team organisations in the word of business. In the first category are classified the teams created within departments, where every member has the responsibility to reach his on targets in the region he covers. Meanwhile, second category teams, multifunctional, are the ones in the high level of management. We think that the differentiation process, in the single function teams, is an effective process. Increasing competition between team members with the purpose of increasing commitment will result in increased revenues for the company. Meanwhile, in cross functional teams, implementing the differentiation process would increase competition, but would negatively affect collaboration between members. We think that team organization it’s a key factor to decide when implementing differentiation process.