When should organisations use just-in-time access for manufacturing identities?

Organisations should use just-in-time access for identities that support temporary maintenance, vendor support, or emergency intervention. JIT is most valuable when standing access would create unnecessary blast radius. It works best when the approval path, session duration, and rollback steps are pre-defined and tied to production schedules and safety requirements.

Why JIT Matters for Manufacturing Identities

Just-in-time access is most useful when a manufacturing identity only needs authority for a narrow task window, such as vendor diagnostics, plant-floor maintenance, patching, or emergency stop-gap intervention. Standing access is the bigger risk because it leaves service accounts, API keys, and operator credentials active long after the job is done. Current guidance from the OWASP Non-Human Identity Top 10 aligns with the NHI risk pattern documented in the Ultimate Guide to NHIs, where 97% of NHIs carry excessive privileges. That matters in manufacturing because privileged access can reach production schedules, control systems, and vendor support channels, not just data systems.

JIT also fits Zero Trust thinking: grant only what is needed, only when it is needed, and only for the duration of the approved session. That reduces blast radius if a maintenance credential is copied, replayed, or misused. It is especially relevant when identities are tied to emergency intervention, because an always-on account is often impossible to justify after the incident is over. In practice, many security teams encounter over-broad factory access only after a contractor account has remained valid far beyond the maintenance window.

How to Apply JIT Without Breaking Operations

Effective JIT for manufacturing identities depends on pre-work, not ad hoc approvals. The access path should define who can approve, what conditions trigger access, how long the session lasts, and what evidence is recorded at the end. The most practical pattern is to combine RBAC for baseline eligibility with runtime checks for context, such as plant location, work order number, maintenance ticket, shift timing, and whether the identity is requesting machine control, log access, or read-only diagnostics. When used well, JIT becomes a short-lived privilege escalation layer, not a replacement for identity governance.

A useful implementation pattern is:

• Issue a task-bound credential with a short TTL.
• Bind the request to a ticket, work order, or incident record.
• Scope access to a single asset, line, or cell instead of the whole environment.
• Revoke the credential automatically when the session ends or the approval expires.
• Log the request, approver, command set, and rollback steps for later review.

The operational goal is to prevent the “maintenance account” from becoming a permanent backdoor. The Ultimate Guide to NHIs — Key Challenges and Risks and the Guide to NHI Rotation Challenges both reinforce that long-lived credentials are hard to govern once they spread across tools and teams. For standards-oriented guidance, the OWASP NHI project is a strong reference point, while Zero Trust architectures help justify short-lived access as a default control.

These controls tend to break down in plants that need uninterrupted 24×7 support across multiple vendors because approval latency, clock drift, and shared consoles make enforcement inconsistent.

Where JIT Needs Exceptions, and Where It Should Not Be Relaxed

Tighter JIT controls often increase operational overhead, so organisations have to balance speed against safety and auditability. That tradeoff is real in manufacturing, where some interventions are time-critical and some assets are safety-sensitive. Best practice is evolving, but there is no universal standard for how much access should be pre-authorised for emergency work. For that reason, the safest design is to predefine a few high-risk exception paths rather than weaken JIT globally.

Some edge cases deserve special treatment. Emergency maintenance may justify a faster approval path, but not a longer session. Third-party vendor support may require remote access, yet that should still be bound to a named ticket and a single asset. Shared operator logins are a poor substitute for JIT because they obscure accountability and make rollback difficult. If the identity is used by scripts or automation, treat it as a workload identity problem rather than a human access problem, and keep the secret ephemeral wherever possible.

Manufacturing teams should also be wary of assuming JIT alone solves credential risk. If the underlying secret is stored in a controller, CI/CD pipeline, or unmanaged vault, the access window may be short while the exposure window remains long. That is why JIT should sit alongside lifecycle controls, rotation, and offboarding, not replace them. The 52 NHI Breaches Analysis shows how quickly overlooked identities become breach paths, and the OWASP Non-Human Identity Top 10 remains useful for deciding where JIT has the highest payoff.

In practice, JIT should be used wherever standing access would widen blast radius more than it improves uptime, but it should be tuned carefully around safety systems, vendor workflows, and emergency response procedures.

Related resources from NHI Mgmt Group

• How should security teams run access reviews for non-human identities?
• How should security teams govern non-human identities that have persistent access?
• When do NHI access reviews create more value than a one-time cleanup?
• How can organisations reduce the blast radius of compromised agent identities?