Which ITIL process helps to monitor IT services by maintaining a logical model of the IT infrastructure and IT services?

Introduction / Context:
Monitoring IT services effectively requires a clear understanding of how infrastructure components and services are related. ITIL introduces a process that maintains a logical model of the infrastructure and services using configuration items and their relationships. This question asks you to identify that process, which is central to understanding impact, dependencies, and traceability in service management.

Given Data / Assumptions:
- The description mentions maintaining a logical model of the IT infrastructure and IT services.
- The context is monitoring and managing services using that model.
- Options include Capacity Management, Change Management, Configuration Management, and Financial Management for IT services.
- We assume familiarity with configuration items and configuration management databases.

Concept / Approach:
In ITIL, Configuration Management, and in newer terminology Service Asset and Configuration Management, is responsible for maintaining accurate information about configuration items, their attributes, and relationships. This information is stored in a configuration management system or database and forms a logical model of the infrastructure and services. This model supports monitoring, impact analysis, change evaluation, and incident resolution. Capacity Management focuses on resource performance, Change Management controls changes, and Financial Management deals with costs, so none of these match the description of maintaining a logical model.

Step-by-Step Solution:
Step 1: Recall that Configuration Management deals with configuration items and their relationships to form a logical model of the environment. Step 2: Connect that knowledge with the phrase in the question about maintaining a logical model. Step 3: Eliminate Capacity Management, Change Management, and Financial Management because they focus on capacity, change control, and financial aspects rather than the configuration model itself. Step 4: Select Configuration Management as the correct process.

Verification / Alternative check:
Consider a common activity such as impact analysis for a change. To understand which services might be affected, you need a model that shows which servers, networks, and applications support each service. This information comes from Configuration Management, not from Capacity or Financial Management. Similarly, monitoring tools often reference configuration data to map alerts to services. This confirms that Configuration Management is the process that maintains the logical model used for monitoring and analysis.

Why Other Options Are Wrong:
Capacity Management ensures that sufficient resources are available and that performance targets are met, but it does not maintain the full relationship model of configuration items. Change Management governs how changes are planned, approved, and implemented, relying on the configuration model but not maintaining it as a primary responsibility. Financial Management for IT services deals with budgeting, accounting, and charging. None of these processes are described in ITIL as maintaining the logical model of the infrastructure and services.

Common Pitfalls:
Learners sometimes confuse Change Management and Configuration Management because they often work together and use similar data. A good way to differentiate is that Change Management decides what changes are allowed, while Configuration Management records what is actually in place. When a question mentions configuration items, relationships, or a logical model, Configuration Management is usually the correct answer.

Final Answer:
Configuration Management.