The distinction between risks and constraints lies in their nature and impact on the project. Here's how they differ:
1. Nature
Risks:
- Are potential future events that could negatively impact the project if they occur.
- Require mitigation plans to reduce their likelihood or impact.
Constraints:
- Are existing limitations or restrictions that define the boundaries of the project.
- Must be accepted and worked within; they are not something you can "mitigate" but rather "address" or "accommodate."
2. Impact
Risks:
- Impact is uncertain; they may or may not happen.
- Example: A dependency might break during migration if not properly mapped.
Constraints:
- Impact is guaranteed as they are fixed limitations of the project.
- Example: Public IPs must be reconfigured due to subscription change, as this is a given fact of how Azure subscriptions operate.
3. Examples From Above
Risks (Uncertain Impact)
- Dependency and Connectivity Issues:
- The possibility that dependencies between resources might break during migration.
- Unsupported Resource Movement:
- Some resources might not support direct migration, potentially leading to manual recreation issues.
Constraints (Fixed Limitations)
- Private and Public IP Reassignments:
- Public IPs are guaranteed to change when moving to a new subscription; this is a limitation of Azure Resource Mover.
- Networking Complexity:
- VPN Gateways and Virtual Networks require reconfiguration because they cannot automatically migrate intact. This is not a risk but a known limitation of the migration process.
Key Takeaway
- Risks are uncertainties that can be mitigated or avoided.
- Constraints are fixed parameters that define what is possible in the project and must be addressed as part of the migration plan.
If constraints seem like risks, it's because they pose challenges, but they are guaranteed occurrences rather than potential issues.
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