中文摘要：

文章通过引入契约价格以及利润分配系数,得到了三方利润共享契约下产品服务系统实现全局协调的必要条件,证明了契约价格参数的设置依赖于供应商、外包商的成本价格,且当利润分配系数在一定范围内取值时,系统中各成员在实现全局协调的基础上将会实现利润共赢。

英文摘要：

By introducing the contract price and the coefficient of profit distribution, the necessary condition of the product service system coordination is obtained under the trilateral profit-sharing contract. It proves that the setting of contract price parameters depends on the costs of the suppliers and the contractors. And when the coefficient of profit distribution ranges within a certain scope, members of it will achieve the win-win situa- tion on the basis of the system efficiency achieved.