What is an example of an end-to-end service measurement?

An end-to-end service measurement evaluates the overall performance of a business service from the customer's viewpoint, encompassing all underlying components and providers. The 'percentage of service downtime related to failed changes' is a prime example. It measures a critical business outcome (service downtime) and links it to a cross-provider process (change management). This metric assesses the collective success of all parties in delivering a stable service, which is the core of end-to-end measurement in a Service Integration and Management (SIAM) ecosystem.

A. This measures a single technical component's availability, not the complete service which may depend on networks, databases, and other applications.
B. This is an operational metric for a single functional unit (the service desk), not a measure of the overall business service quality.
D. This measures a single provider's performance in isolation, which can lead to the 'watermelon SLA' effect where individual providers meet targets, but the end service fails.

1. Scopism Limited. (2020). Service Integration and Management (SIAM™) Foundation Body of Knowledge (Second edition). Section 4.5.3, 'Measuring and Reporting', p. 78. The text emphasizes that in a SIAM model, "The reports should focus on the customer outcomes and the end-to-end service." Service downtime is a direct customer outcome.

2. Scopism Limited. (2020). Service Integration and Management (SIAM™) Foundation Body of Knowledge (Second edition). Section 4.5.3, 'Measuring and Reporting', p. 77. This section explains the 'watermelon SLA' phenomenon, which directly illustrates why measuring a single provider's performance (Option D) is not an effective end-to-end measurement.

3. van Sante, S., & Major, S. (2018). SIAM/ITIL - A Management Guide. Van Haren Publishing. Chapter 5, 'Performance Management', discusses the necessity of shifting from component-level metrics to end-to-end service metrics that reflect business value and customer experience. 'Service downtime' is a key metric in this context.