Define [Identify] (internal and external) customer concerns issues formally as qualitative requirements and quantitative performance criteria with numerical Targets supporting service levels at optimal TCO .

• 详细说明[识别]（内部和外部）客户一般关心的问题正如具有数字的目标的定性需求和定量的性能标准，其在优化的TCO中支持服务级别。