Prioritise inventory enough to know what exists, but move quickly to access review once the app list is credible. Licence optimisation saves money, yet access review tells you whether the right identities still need the access they hold. In practice, review and offboarding matter more than seat efficiency when risk is the concern.
Why the order is inventory, then access review, not licence tuning
The first job is to make the app list credible enough that the governance team is not reviewing a moving target. Once you can trust what is in scope, access review becomes the highest-value control because it tests whether the right identities still need the access they hold. That is the point at which IAM and IGA Basics stop being theory and become an operating model for the review process.
Licence optimisation is still useful, but it answers a different question: how efficiently are seats being consumed? Access review answers a stronger governance question: who should keep access at all, and who should be removed or reduced. In practice, the sequencing matters because a clean inventory supports both review and optimisation, while optimisation alone can leave excessive entitlements untouched.
How inventory, access review, and licence optimisation serve different decisions
Inventory is the foundation because you cannot govern what you cannot enumerate. For SaaS, that means knowing which apps exist, which accounts are connected, which roles or groups are active, and whether there are orphaned integrations or stale admin paths. The inventory only needs to be good enough to support a defensible review cycle, not perfect enough to delay action indefinitely. The same lifecycle logic appears in NHI Lifecycle Management Guide, where discovery and ownership come before offboarding and recertification.
Access review is the control that changes risk the fastest. It forces the team to validate whether each user, admin, contractor, or service identity still needs its current access, and it catches privilege creep that licence reports miss. A licence report can tell you a seat is unused or underused; it will not reliably tell you whether a dormant entitlement could still be abused.
Licence optimisation is best treated as a secondary efficiency exercise after the governance baseline is in place. It can produce meaningful savings, especially where SaaS sprawl is large, but it should not displace review of privileged, shared, or business-critical access. Teams that start with seat clean-up often discover they have reduced cost without reducing exposure. The review process itself is stronger when paired with a clear role and entitlement model, as covered in Access Reviews and Certification Guide.
What good prioritisation looks like in a SaaS governance programme
Good prioritisation is pragmatic: establish enough inventory to trust scope, then run access review on the highest-risk applications, roles, and privileged accounts first. That usually means finance, customer data, admin consoles, and any app with external sharing, API access, or delegated administration. If the app catalogue is still incomplete, do not wait for perfection, but do require a credible source of truth before certifying access outcomes.
For teams that manage many applications, the strongest operating pattern is a rolling loop: discover, validate ownership, review access, remediate, then use the findings to improve the inventory. This is the same discipline that keeps IGA Buyer’s Guide focused on lifecycle, reviews, roles, and disconnected applications rather than on seat counts alone.
Practitioner takeaway: If the question is risk reduction, start with a credible inventory only to the point that access review can be trusted, then spend the next cycle on removing unnecessary access before chasing licence savings.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST SP 800-53 Rev 5, CIS Controls v8 and CSA Cloud Controls Matrix set the technical controls, while ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-53 Rev 5 | AC-2 — Account Management | SaaS inventory and access review both depend on accurate account lifecycle control. |
| AC-6 — Least Privilege | Access review is the mechanism that removes excess SaaS entitlements and privileges. | |
| Recommendation — Review and revoke inactive SaaS accounts under AC-2 before optimising licence counts. Use AC-6 to trim permissions during recertification, not after licence clean-up. | ||
| CIS Controls v8 | CIS-5 — Account Management | Prioritisation here hinges on knowing accounts, removing stale access, and governing entitlements. |
| Recommendation — Apply CIS-5 to inventory accounts first, then review and remove unneeded SaaS access. | ||
| ISO/IEC 27001:2022 | A.5.15 — Access control | SaaS governance is fundamentally about controlling who can access which applications. |
| Recommendation — Use A.5.15 to govern access decisions before treating licence optimisation as the main outcome. | ||
| CSA Cloud Controls Matrix | IAM — Identity and Access Management | Cloud/SaaS governance relies on IAM controls for inventory, entitlement review, and access removal. |
| Recommendation — Use IAM controls to connect app inventory with review and deprovisioning. | ||
Related resources from NHI Mgmt Group
- Should organisations prioritise external exposure or internal credential governance first?
- How should security teams connect SaaS contract review to access governance?
- What frameworks should IAM teams use for SaaS governance and access control?
- What should IT teams do first when a SaaS management vendor shuts down and access to inventory data is cut off?