定义有关 IT 服务和解决方案变更的政策。以合理且可预测的方式管理变更，以便员工可以做出相应的计划。减少对用户社区的负面影响。增加 IT 服务和解决方案的价值。 Defining policies regarding changes in IT services and solutions. Manage changes in a rational and predictable manner so that employees can plan accordingly. Reduce the negative impact to the user community. Increase the value of IT services and solutions.