What's changed: Initial version
1.4Service catalogue and the place of service level management
Understand how the service catalogue makes live services visible from the customer's view, and the place of service level management that agrees and sustains SLAs on top of it—framed by balancing customer expectations against cost.
A service catalogue is a document listing currently live services in a form customers can understand and choose from, showing each service's content, delivery conditions, and related service levels. It is the "available now" part of the broader service portfolio, which also covers services in design or retired. For a service manager, the catalogue aligns what customers may expect and provides the premise for agreeing SLAs.
On top of the catalogue, service level management (SLM) agrees an SLA with the customer for each service and measures and reviews achievement. The key is that a service level is not "the higher the better": it is set at the balance between what the customer truly needs and the cost and risk to support it. An excessive service level inflates the cost of redundancy and monitoring, while too low a level harms the customer's outcome. SLM agrees this balance point with the customer and keeps it consistent with the catalogue.
Suppose a customer demands a flat "99.99% availability for all services." Using the catalogue to check each service's use, the manager finds high availability is reasonable for the core order-taking service, but an internal reference-information service has little business impact if it stops. Making everything 99.99% would spike the cost of redundancy and monitoring beyond the value it returns. In an SLM review, the manager differentiates levels by business impact (high availability for order-taking, standard for reference information) and reflects the result in the catalogue and SLAs, agreeing with the customer. Not swallowing a blanket high-level demand, but apportioning levels by the balance of need and cost, is the manager's judgment.
Suspect answers that equate "higher service level is better." The norm is to differentiate levels by business impact and set them at the balance of need against cost and risk.
1.4.1Section summary
- The service catalogue makes live services visible to customers and premises SLA agreement; it is the "available now" part of the portfolio.
- SLM agrees, measures, and reviews SLAs on the catalogue, setting levels at the balance of need against cost and risk.
- A higher service level is not better; apportioning levels per service by business impact is the manager's judgment.
Sign in to track progress — Log in.
Quick check
(just a quick review)Q1. A customer demands a flat 99.99% availability for all services. The catalogue shows high availability is reasonable for the core order-taking service, but an internal reference-information service has little impact if it stops. What should the service manager do?
Q2. Which is the most appropriate service-manager explanation of the relationship between the service catalogue and the service portfolio?
Q3. When SLM agrees an SLA level with the customer, what principle should the service manager base it on?