1. Planning.

• Assessment
  Begin by identifying who requires access to specific Trello boards, the necessary lists, cards, and labels they need, and the reason for access. You should document existing access rights and review if they can be minimized or removed. An entitlement discovery tool could be useful in providing better visibility.
• Policy creation
  Develop explicit policies for granting and revoking Trello access, specifying who can request access, under what circumstances, and for how long. Especially for members with administrative roles, establish time-limited privileges.
• Source of truth
  Align your JIT access system with an Identity Provider like Okta, Google Workspace, Azure AD, OneLogin. By doing this, you create a reliable source for identities. It's better to de-escalate individual identities over shared accounts for improved authorization control and precise auditing.

2. Execution.

• Self-Serve Access Requests
  Simplify the process by enabling Trello users to request access through the system, not through other team members. Improve adoption rates by allowing integration with IM platforms such as Slack or MS Teams. Ensure that requests detail who's requesting, the required access, duration, and reason.

• Approval process
  JIT access offers the chance to delegate approvals to team leaders with business context. These individuals often have a better understanding than IT helpdesks. Use messaging platforms for timely responses, providing approvers with all necessary information for a well-informed decision.

• Conditional Approval Workflows
  Incorporate set access policies into workflows that dictate Trello accesses. Provide conditions like assigning if-then situations. For example, IF team member “X” requests access to specific Trello board “Y”, seek approval from “Z” and notify “M”.

• Integrations
  Integrate JIT access with other IT and security systems for added flexibility. Manage all permissions in one place, without having to build or control every Trello board individually.
• Access methods
  For Trello JIT Access, APIs could be a good fit due to their adaptability and real-time capabilities. Combining methods might be needed, such as using SAML for authentication, SCIM for user provisioning, and APIs for precise access control.

3. Maintenance.

• Regular Audits
  Routinely inspect access logs to ensure JIT access for Trello operates as intended. Search for unusual patterns, either directly or by feeding logs into your SIEM.
• User training
  Teach Trello users, particularly privileged users, about JIT Access principles, and how to request necessary access.
• Feedback loop
  Regularly review your JIT access processes. Ask for input from Trello users and IT staff to uncover potential improvements.

Following this systematic strategy will enable you to effectively implement a strong JIT Access system for Trello.