Review routing is the process of assigning an access review or approval task to the person or group most appropriate to decide. In mature governance programmes, routing reflects context such as ownership, role, or operational status, not just a static manager chain.
Expanded Definition
Review routing is the governance logic that decides who should handle an access review, approval, or exception based on context such as asset ownership, business function, operational duty, or risk tier. In NHI programmes, it helps ensure that the reviewer is the person or group with the right authority and evidence, not simply the closest manager in the org chart.
That distinction matters because review routing sits between policy and execution. A static manager chain may work for human staff, but it often breaks down for service accounts, API keys, robots, and NIST Cybersecurity Framework 2.0 aligned control processes where ownership can be technical, shared, or ephemeral. Mature routing also accounts for delegation, break-glass coverage, and inactive owners, which is why definitions vary across vendors and no single standard governs this yet. NHI Management Group treats review routing as a governance decision layer, not a workflow checkbox.
The most common misapplication is sending every review to a manager by default, which occurs when ownership metadata is missing or when identity governance tools are configured without NHI-specific context.
Examples and Use Cases
Implementing review routing rigorously often introduces operational complexity, requiring organisations to weigh faster approvals against the cost of maintaining accurate ownership and exception metadata.
- An API key review is routed to the platform team that owns the workload, because the human manager cannot validate whether the key is still required.
- A service account access review is routed to the application owner and the security team together, using a dual-approval path for higher-risk entitlements.
- A dormant NHI exception is routed to an operational on-call group instead of the original requester’s manager, because the asset was reassigned after deployment.
- A privileged token review is escalated to a risk committee when the entitlement supports production data access and the business impact is high.
- Ownership review for secret rotation is routed using context from the Ultimate Guide to NHIs, then validated against workflow expectations described in NIST Cybersecurity Framework 2.0.
When routing works well, reviewers receive decisions they can actually make, with the evidence needed to approve, reject, or escalate without bouncing tickets across teams.
Why It Matters in NHI Security
Review routing is a control quality issue as much as a workflow issue. If routing sends decisions to the wrong person, reviews become symbolic, overdue, or rubber-stamped, and that weakens the entire governance chain for service accounts, secrets, certificates, and agentic access. In practice, poor routing often hides excessive privilege, stale ownership, and orphaned identities until an incident forces the organisation to investigate.
The risk is not theoretical. According to NHI Management Group’s Ultimate Guide to NHIs, 97% of NHIs carry excessive privileges, which makes accurate routing essential when entitlement decisions need human validation. Review routing also supports the governance expectations reflected in NIST Cybersecurity Framework 2.0 by helping organisations assign accountability where it can be acted on, not just documented.
Organisations typically encounter the consequences only after a privileged account is misused or an access review fails audit scrutiny, at which point review routing becomes operationally unavoidable to address.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 address the attack and risk surface, while NIST CSF 2.0 and NIST Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-08 | Review routing supports accountable approval paths for NHI access governance. |
| NIST CSF 2.0 | GV.RM-01 | Routing is part of governance and risk decision assignment for access reviews. |
| NIST Zero Trust (SP 800-207) | PL-2 | Zero Trust planning depends on context-aware review and approval workflows. |
Route NHI reviews to the true owner or delegate, then enforce evidence-based approval and escalation.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on June 7, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
