Dependency Map
Last Updated: September 28, 2026
Estimated Reading Time: 6 minutes
Overview
Dependency Map turns synced ServiceNow CIs and relationships into an interactive topology view. Use it to inspect service dependencies, understand upstream and downstream relationships, and prepare for change-impact analysis.
When To Use It
Use Dependency Map when you need to:
- understand how CIs are connected
- inspect the supporting infrastructure for a service
- identify relationship gaps
- prepare for a Blast Radius analysis
- explain topology to service owners or change reviewers
Core Concepts
Nodes
Nodes represent Configuration Items such as services, applications, servers, databases, and network devices.
Node appearance may reflect type, health, criticality, or other view settings.
Edges
Edges represent ServiceNow relationships. Direction is important when you analyze dependency flow. A relationship can show that one CI depends on, runs on, contains, hosts, or connects to another CI.
Focused Views
Large CMDBs can be noisy. Use search, filters, and focus mode to inspect a smaller part of the topology.
Navigation
Common controls include:
- pan by dragging the canvas
- zoom with scroll or zoom controls
- click a node to inspect details
- click an edge to inspect relationship details
- search for a CI by name
- use fit-to-screen after changing filters
Layouts
Different layouts answer different questions:
| Layout | Best For |
|---|---|
| Clean Topology | readable default view of services and dependencies |
| Compact Topology | dense maps on a smaller screen |
| Hierarchical | parent-child dependency chains |
| Force Directed | natural clusters and relationship density |
| Layer-Based | infrastructure and service tiers |
| Business Service | business or application service context |
| Network Topology | connectivity and network-heavy views |
| CSDM Stack | service model structure |
| Grid | scanning and presentations |
If the map feels crowded, filter first. A smaller graph is easier to read and performs better.
Analysis Modes
The Dependency Map has four modes. They look similar, but they answer different questions.
| Mode | Question | How to start it |
|---|---|---|
| Focus | What is around this CI? | Right-click a CI and select Focus on this CI. |
| Time Machine | What changed between syncs? | Turn on Time Machine. See CMDB Activity and Time Machine. |
| Blast Radius | If this CI fails, what depends on it? | Right-click a CI and select Simulate Outage. See Blast Radius Simulator. |
| Exposure Analysis | If this CI is compromised, what can it reach? | Right-click a CI and select Exposure Analysis. See Exposure Analysis. |
Focus mode shows context only. It does not show outage impact or security exposure.
Detail Panels
Click a node to review:
- CI name and class
- health status
- key attributes
- relationship counts
- available actions
Click a relationship to review:
- relationship type
- source and target CIs
- direction
- compliance or quality indicators when available
Common Workflows
Inspect a service
- Search for the service or application.
- Focus on the selected node.
- Review upstream and downstream relationships.
- Open related CIs as needed.
Prepare for change review
- Find the CI that will change.
- Inspect direct relationships.
- Use Blast Radius for formal impact analysis.
- Export or reference findings in the change process.
Find relationship gaps
- Filter to the relevant service or CI class.
- Look for isolated or unexpected nodes.
- Confirm gaps in ServiceNow.
- Route confirmed correction work through Remediation or CSDM Workbench.
Performance Guidance
For large environments:
- filter to one environment
- reduce node count before changing layout
- use focus mode
- avoid rendering broad all-CI maps when investigating a specific issue