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Four Dragons is a ServiceNow CMDB and CSDM remediation partner; this tool is part of how we quantify CMDB health and CI data quality before scoping remediation.
ServiceNow measures CMDB health across three pillars: completeness (are the right configuration items there, with owners and relationships), compliance (do CIs meet your data standards, including CSDM alignment and tuned Identification & Reconciliation rules), and correctness (is the data current, de-duplicated, and trustworthy). This free calculator gives you a directional score across all three in about two minutes, then tells you where to focus first.
ServiceNow CMDB Health Calculator
Score your CMDB in about two minutes across the three pillars ServiceNow measures — Completeness, Compliance, and Correctness — and get a prioritized fix list.
Free, no email required. Answers stay in your browser.
Where to focus first
Want the real number? A fixed-scope Four Dragons CMDB Health Check assesses your actual instance against these pillars and hands back a prioritized remediation plan.
This self-assessment is directional, based on ServiceNow’s completeness / compliance / correctness health model. It is not a substitute for a data-driven assessment of your instance.
How the score works
Each answer maps to one of the three pillars and scores 0, 50, or 100. Pillar scores are the average of their questions; your overall score is the average of the three pillars. Under 50 is Critical, 50–74 is At risk, and 75 or above is Healthy. The recommendations surface the lowest-scoring areas first, because in a CMDB the weakest pillar caps the value of everything built on top.
Frequently asked questions
What is a good CMDB health score? On this scale, 75 or higher (Healthy) means the data can generally be trusted for change and incident impact analysis. Most enterprises that have not run a focused remediation land in the At-risk or Critical bands.
Why does completeness come first? Missing owners, discovery coverage, and relationships mean the CMDB is incomplete at the source. Compliance and correctness work built on incomplete data cannot fully succeed, so completeness is usually the first fix.
Is this the same as a CMDB Health Check? No. This is a directional self-assessment. A Four Dragons CMDB Health Check measures your actual instance against these pillars and returns a prioritized remediation plan.
Key takeaways
- The CMDB Health Calculator gives you a fast, self-serve estimate of your ServiceNow CMDB (Configuration Management Database) health.
- It scores the three dimensions that matter: completeness, correctness, and compliance with CSDM (Common Service Data Model).
- Use it to get a directional baseline before a full, evidence-based CMDB Health Check.
- Low scores usually point to a skills gap in Discovery, class modeling, or governance — not unfixable technical debt.
- Results help you prioritize where remediation delivers the most value.
What the calculator does
The calculator asks a short set of questions about your configuration data and returns an estimated health score across completeness (are the right CIs present), correctness (is the data accurate), and CSDM compliance (is it structured to ServiceNow's standard model). It is a directional self-assessment — a starting point that a full CMDB Health Check then validates with evidence from your instance.
Frequently asked questions
What does the CMDB Health Calculator measure?
It estimates CMDB health across completeness, correctness, and CSDM compliance, based on your answers about CI coverage, data accuracy, and governance.
How accurate is the score?
It is a directional self-assessment meant to baseline your current state quickly. A full CMDB Health Check verifies the numbers with real data from Discovery and Service Mapping.
What is a good CMDB health score?
Healthy CMDBs score high on required-CI completeness and correctness with strong CSDM alignment. The calculator flags which dimension is dragging your score down.
What do I do with a low score?
A low score points to where remediation matters most — often Discovery coverage, class modeling, or data governance. These are skills-gap issues that a structured remediation plan resolves.
What is the next step after the calculator?
Move to a fixed-scope ServiceNow CMDB Health Check, which validates the estimate and returns a prioritized remediation roadmap.
Related reading: What is a CMDB?