Access reviews become checkbox exercises when roles are not defined in business terms. Reviewers can certify a title or system role without understanding the real duties it unlocks, which leaves redundant or conflicting access in place and weakens segregation of duties control.
Why This Matters for Security Teams
When SAP access reviews are not tied to business roles, reviewers end up certifying technical objects instead of actual job functions. That weakens the core purpose of the review: proving that each person has access only to the transactions, tables, and approvals needed to perform a defined business duty. It also makes segregation of duties harder to validate, because conflicting access can hide inside broad composite roles or inherited profiles.
In practice, this turns a governance control into an administrative ritual. A reviewer may approve a “role” because the title looks familiar, while the underlying access quietly enables posting, approval, and master-data changes in the same workflow. NHIMG’s Ultimate Guide to NHIs notes that 97% of NHIs carry excessive privileges, a reminder that entitlement sprawl is common whenever controls are not anchored to real operational need. OWASP’s OWASP Non-Human Identity Top 10 also reinforces that access tied to identity labels alone is too weak for modern governance.
In practice, many security teams encounter SoD violations only after audit findings, fraud review, or a process incident has already exposed the gap, rather than through intentional access design.
How It Works in Practice
Effective SAP review design starts by mapping access back to business roles, not just system roles. A business role describes the work being performed, such as accounts payable processor, plant maintenance supervisor, or procurement approver. The technical SAP role set should then be traced to that function so reviewers can judge whether the access still matches the duty.
This mapping usually needs three layers of control:
- Business role definition that names the job function, scope, and control constraints.
- Technical role translation that shows which SAP authorizations, transaction codes, and derived roles support that function.
- Review evidence that tells the certifier what the role actually enables, including privileged combinations and SoD conflicts.
The strongest programs make reviews exception-driven. Instead of asking whether a role name looks right, they ask whether the access is still required for the current process, location, project, or reporting line. This is where current guidance from NHI Lifecycle Management Guide becomes relevant: access must be continually validated across its full lifecycle, not just at assignment time. That lifecycle mindset aligns with the operational message in Ultimate Guide to NHIs — Key Challenges and Risks, where stale access and poor visibility are treated as persistent risk factors.
For SAP specifically, reviewers should see SoD conflicts, firefighter or emergency access usage, role inheritance, and any access granted outside the standard business role catalogue. Best practice is evolving, but current guidance suggests that recertification should be supported by process owners who understand the work, not only by system owners who can confirm the role exists. These controls tend to break down when business role catalogs are stale, because the access model then mirrors yesterday’s org chart instead of today’s operating process.
Common Variations and Edge Cases
Tighter role mapping often increases review effort, requiring organisations to balance control quality against catalog maintenance, reviewer fatigue, and change velocity. That tradeoff matters in SAP environments where mergers, shared services, and custom Z roles create overlapping access paths that are hard to classify cleanly.
There is no universal standard for this yet, but several edge cases recur. Temporary project access may be justified outside the normal business role if it is short-lived and time-bound. Shared service teams may need broader technical roles, but those roles still need documented business intent and compensating controls. Emergency access also needs separate treatment because it should not be certified as if it were ordinary standing access.
Another common failure mode is overreliance on role names. A role called “AP Read Only” may still inherit change capability through an attached derived role or composite structure. In that case, the review can look clean while the risk remains. NHIMG’s 52 NHI Breaches Analysis is a useful reminder that hidden privilege paths and weak lifecycle controls are recurring breach patterns, even when the front-end governance process appears complete.
Where SAP access reviews are tied to business roles and backed by process ownership, organisations can actually detect redundant, conflicting, or unjustified access before audit or fraud does.
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 CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-03 | Business-role mapping limits excessive standing access and stale entitlements. |
| NIST CSF 2.0 | PR.AC-4 | Least-privilege reviews depend on knowing what access each role truly enables. |
| NIST CSF 2.0 | PR.DS-5 | Role-based review failures often leave sensitive SAP functions exposed. |
Use SoD-aware review evidence to prevent approval, posting, and master-data rights from combining.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on June 24, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
