Scope and fit
A useful boundary explains where customer information moves and which people and systems can affect its protection. It is a working model of the service, not just a list of cloud accounts.
Map the service as customers use it
Trace a representative request from entry point through application components, data stores, support workflows, and outbound integrations. Include operational tooling if it can access production or customer data.
Record what is excluded and why
For each exclusion, state the reason, dependency, and control that limits its effect on the in-scope service. An exclusion without a rationale can make the boundary appear arbitrary.
Revisit after material change
New regions, acquired products, identity providers, subprocessors, and support models can change the boundary. Put a review trigger into architecture and release processes instead of relying on annual memory.
Decisions and tradeoffs
Use this table as a working review record. Replace assumptions with evidence from the target environment.
| Decision area | Working guidance |
|---|---|
| Map the service as customers use it | Trace a representative request from entry point through application components, data stores, support workflows, and outbound integrations. Include operational tooling if it can access production or customer data. |
| Record what is excluded and why | For each exclusion, state the reason, dependency, and control that limits its effect on the in-scope service. An exclusion without a rationale can make the boundary appear arbitrary. |
| Revisit after material change | New regions, acquired products, identity providers, subprocessors, and support models can change the boundary. Put a review trigger into architecture and release processes instead of relying on annual memory. |
Implementation questions
What should the team decide about map the service as customers use it?
Trace a representative request from entry point through application components, data stores, support workflows, and outbound integrations. Include operational tooling if it can access production or customer data. Use a named owner and a written acceptance check so this decision can be reviewed after deployment.
What should the team decide about record what is excluded and why?
For each exclusion, state the reason, dependency, and control that limits its effect on the in-scope service. An exclusion without a rationale can make the boundary appear arbitrary. Use a named owner and a written acceptance check so this decision can be reviewed after deployment.
What should the team decide about revisit after material change?
New regions, acquired products, identity providers, subprocessors, and support models can change the boundary. Put a review trigger into architecture and release processes instead of relying on annual memory. Use a named owner and a written acceptance check so this decision can be reviewed after deployment.
Plan, build, verify, operate
Map the service as customers use it: Trace a representative request from entry point through application components, data stores, support workflows, and outbound integrations. Include operational tooling if it can access production or customer data. Record the result and the next owner before changing the next boundary.
Record what is excluded and why: For each exclusion, state the reason, dependency, and control that limits its effect on the in-scope service. An exclusion without a rationale can make the boundary appear arbitrary. Record the result and the next owner before changing the next boundary.
Revisit after material change: New regions, acquired products, identity providers, subprocessors, and support models can change the boundary. Put a review trigger into architecture and release processes instead of relying on annual memory. Record the result and the next owner before changing the next boundary.
Deployment checks
Turn the page into a reviewable handover by assigning each check to a person and retaining its result.
How to Define a Clear Security Assessment Boundary: decision 1
Write down the boundary, owner, dependency, and proof required for how to define a clear security assessment boundary before implementation begins.
How to Define a Clear Security Assessment Boundary: decision 2
Write down the boundary, owner, dependency, and proof required for how to define a clear security assessment boundary before implementation begins.
How to Define a Clear Security Assessment Boundary: decision 3
Write down the boundary, owner, dependency, and proof required for how to define a clear security assessment boundary before implementation begins.
Handover and ownership
Before handover, name the system owner, support path, access boundary, backup or recovery responsibility, and the condition that pauses a change.
Keep a short record of what was tested, what remains outside scope, and when the review should happen again.
