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Question 5: CMDB Health Metrics
In CMDB Health, which metric measures whether required attributes are populated?
- A：Compliance
- B：Correctness
- C：Completeness
- D：Accuracy
【Correct Answer】 C. Completeness
【Detailed Explanation】
The CMDB Health dashboard uses three primary KPIs (metrics) to evaluate data quality. Understanding the role of each is critical for both the exam and professional practice.
- C. Completeness (Correct Answer):
- Role: Measures how well the necessary information for a CI (Configuration Item) is populated.
- Details: It verifies whether data is entered into the “Required” or “Recommended” attributes defined in the CI Class Manager. For example, if “Serial Number” or “Asset Tag” is empty for a Server CI, the score for this metric will decrease.
- A. Compliance:
- Role: Measures whether a CI adheres to a “Desired State” or specific configuration policies.
- Details: Based on audit rules, it checks whether a CI meets defined configuration standards—for example, whether the OS version is correct or if specific ports are closed.
- B. Correctness:
- Role: Measures the “quality” and “integrity” of the data.
- Details: It consists of the following three sub-metrics:
- Duplicate: Checks if multiple records exist for the same CI.
- Orphan: Checks if necessary parent-child relationships are missing.
- Stale: Checks if the CI has not been updated for a long period.
- D. Accuracy:
- Role: While commonly used as a general term, this is not an official name (category) for a ServiceNow CMDB Health KPI. It is typically addressed as part of Correctness.
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