Within the Continual Service Improvement (CSI) 7 step improvement process, data needs to be gathered and analyzed from which other area of the lifecycle in order to answer the question "Did we get…

Service Strategy defines business goals and investment decisions but does not generate the real-time service performance data required to measure goal achievement.

Service Design establishes targets and architectural specifications but does not produce the ongoing operational metrics needed to determine whether those targets were actually met in production.

Service Operation is where services are delivered day-to-day and where actual performance metrics such as availability, response times, and incident volumes are recorded. To answer 'Did we get there?', CSI must pull this operational performance data and compare it against the targets agreed in SLAs. No other lifecycle stage produces the runtime measurement data needed for this comparison.

Service Transition manages the controlled introduction of services into the live environment but does not supply steady-state operational performance measurements needed for this CSI question.