Calculator Inputs
Use the stacked page layout below. The fields inside the calculator adapt to large, medium, and mobile screens.
Example Data Table
| Method | Restore Success | Integrity | Immutability | Exercises/Year | Estimated Strength |
|---|---|---|---|---|---|
| Immutable Air-Gapped Backup | 95% | 93% | 98% | 8 | 92.4 |
| Immutable Cloud Snapshot | 89% | 91% | 94% | 6 | 86.3 |
| Replicated DR Site | 92% | 88% | 84% | 10 | 88.1 |
| Manual Rebuild | 62% | 70% | 40% | 2 | 55.7 |
Formula Used
The calculator builds a weighted base score from ten control areas, then adjusts it by method quality and exercise frequency.
Weighted Base Score = Σ (Metric Value × Weight) ÷ 100
Method Factor = multiplier assigned to the selected recovery approach
Exercise Factor = 0.90 + min(0.16, (Exercises per Year ÷ 24) × 0.16)
Recovery Method Strength = min(100, Weighted Base Score × Method Factor × Exercise Factor)
| Metric | Weight |
|---|---|
| Restore Success Rate | 16% |
| Data Integrity Verification | 14% |
| RTO Achievement | 12% |
| RPO Achievement | 12% |
| Automation Coverage | 8% |
| Offsite Redundancy | 10% |
| Immutability Resistance | 12% |
| Access Control & Encryption | 6% |
| Runbook Documentation | 5% |
| Isolation Readiness | 5% |
How to Use This Calculator
- Select the recovery method that best matches your actual restoration design.
- Enter each control score as a percentage from 0 to 100.
- Use evidence from tests, audits, dashboards, and incident reviews.
- Add the number of meaningful recovery exercises completed yearly.
- Press Submit to calculate the composite strength score.
- Review the final rating, gap, chart, and weakest priority area.
- Export the result in CSV or PDF format for reporting.
- Recalculate after any control improvement, architecture change, or major test.
8 FAQs
1) What does this score measure?
It measures how strong a recovery method is across restore success, data integrity, recovery objectives, automation, redundancy, immutability, documentation, access protection, and isolation readiness.
2) Is a higher method factor always enough?
No. A strong method can still score poorly when testing, documentation, integrity validation, or operational execution is weak. The multiplier helps, but poor controls still reduce the outcome.
3) Why can two teams using the same method get different scores?
The architecture may be similar, but execution differs. Restore success, encryption discipline, runbook quality, recovery practice frequency, and isolation capability all influence the final result.
4) How often should I recalculate recovery strength?
Recalculate after every major backup redesign, resilience project, ransomware simulation, disaster recovery test, or control audit. Quarterly review is also useful for critical systems.
5) Can I use this for ransomware preparedness?
Yes. Immutability, isolation readiness, offsite redundancy, and verified restore success make it useful for ransomware resilience reviews, especially when comparing recovery options.
6) Does this replace formal disaster recovery testing?
No. It is a scoring aid, not a substitute for full technical testing. Real drills, integrity checks, timing evidence, and dependency validation remain essential.
7) How should I score subjective controls like documentation?
Use a rubric. For example, 100 means complete, current, tested, and version-controlled. Lower values reflect outdated procedures, missing owners, or unverified recovery steps.
8) What score is generally acceptable?
Many teams target 80 or above for critical workloads. Regulated or high-impact environments often aim higher, especially when data loss tolerance and recovery speed are tight.