Reviewing and Collaborating on Threat Models
Threat modeling is most effective when it is collaborative.
Devici is designed to support discussion, review, and shared understanding across engineering, security, and architecture teams. Threat models are not owned by a single person — they are shared artifacts that evolve through collaboration.
This section explains how teams review, discuss, and refine threat models together.
Why collaboration matters
Threat models benefit from multiple perspectives.
Different roles bring different insights:
- Engineers understand implementation details and constraints
- Security practitioners identify patterns and common weaknesses
- Architects evaluate system boundaries and trust assumptions
Collaboration helps ensure threat models reflect reality, not assumptions.
Reviewing threat models together
Threat model reviews are commonly used to:
- Validate system design and assumptions
- Identify missing elements or data flows
- Confirm whether identified threats are relevant
- Agree on appropriate actions
Reviews can be lightweight and informal. They do not need to follow a rigid process to be effective.
What to focus on during a review
During a review, teams typically focus on a few key areas.
System representation
Confirm that the model accurately reflects how the system behaves:
- Are all relevant components represented?
- Do data flows match real interactions?
- Are trust boundaries placed correctly?
- Is scope clearly defined?
If the model is inaccurate, threat identification will be misleading.
Attributes and assumptions
Attributes describe system behavior and assumptions.
During review, consider:
- Are attributes applied to the correct elements or flows?
- Do the attributes accurately describe reality?
- Are there assumptions that should be revisited?
Adjusting attributes often has the biggest impact on threat accuracy.
Identified threats
Threats should make sense in context.
Review identified threats by asking:
- Does this threat logically follow from the model?
- Do the triggering attributes make sense?
- Is important context missing?
Unexpected threats usually indicate modeling gaps rather than false positives.
Discussing and agreeing on actions
Actions represent intentional decisions, not automatic outcomes.
Teams should collaborate to decide whether to:
- Address the threat through design changes or controls
- Document why the threat does not apply
- Accept the exposure with a clear rationale
- Defer action until later phases
Agreement on actions helps avoid confusion and duplicated effort.
Using comments and context
Devici supports adding context directly to threats and actions.
Teams often use this to:
- Record design decisions
- Capture reasoning behind accepted exposure
- Explain why certain mitigations were chosen
- Provide guidance for future reviewers
This context becomes valuable over time as systems and teams change.
Reviewing models over time
Threat model reviews are not one-time events.
Reviews are especially useful when:
- Major features or integrations are added
- Architectural changes occur
- Ownership or team structure changes
- Security expectations evolve
Periodic reviews help keep models aligned with reality.
Balancing speed and rigor
Not every change requires a formal review.
Teams should balance rigor with practicality:
- Small changes may only need quick validation
- Larger changes benefit from broader review
- Reviews should support delivery, not block it
Devici supports both lightweight and more structured collaboration.
What’s next
Once teams are collaborating effectively, the next step is integrating threat modeling into everyday development workflows.
In the next section, we’ll explore how Devici fits into the software development lifecycle.