In ServiceNow, each CMDB Health metric can independently define which CIs are in scope for evaluation. This scoping is controlled primarily through Health Inclusion Rules, not CMDB Groups. In this scenario, the Duplicate metric evaluates all 60,000 Server CIs, indicating no inclusion rule is restricting its scope. In contrast, the Orphan metric evaluates only 50,000 Server CIs, which means 10,000 servers are intentionally excluded from that metric's evaluation. This difference is explained by a Health Inclusion rule configured specifically for the Orphan metric on the Server class. Health Inclusion rules allow administrators to define conditions-such as lifecycle state, environment, discovery source, or operational status-that determine whether a CI should be included in a specific health calculation. For example, retired servers or servers in build states may be excluded from orphan checks. CMDB Groups are not used by the CMDB Health Engine to determine metric scope; they are used for reporting, assignment, and operational grouping. Therefore, Options A and D are incorrect. Option C is also incorrect because the Duplicate metric clearly evaluates the full population of 60,000 servers. Thus, the scope difference is correctly explained by the Orphan metric having a Health Inclusion rule configured, making Option B the verified answer.
