Among them, core competence, changing expectation of customer, epiboly stratagem, separately explain the reason of cooperation from intrinsic reason, exterior pressure, outside stratagem.

• 其中，核心竞争力，不断变化的顾客期望，外包战略，分别从企业合作的内在动因，外部压力，外在战略这三个方面对合作的起因给予了解释。