# Failed Deployment Recovery Time Calculator

> Mean time to restore service after a change that failed.

Page: https://freecalculator.tech/tools/recovery-time-calculator
Last reviewed: 2026-09-16

## Formula

Recovery time = Total restore time after failed changes / Number of failed changes

- Recovery time = Total restore time after failed changes / Number of failed changes.
- Inputs used: Total time to restore service after failed changes, Failed changes counted.
- Edge handling: Total time to restore service after failed changes is required.; Total time to restore service after failed changes cannot be negative.; Total time to restore service after failed changes must be no more than 1000000000000.; Failed changes counted is required.; Failed changes counted cannot be negative..

## Inputs

- Total time to restore service after failed changes
- Failed changes counted

## Worked example: 9.5 hours of recovery across 5 failed deployments

This counts failed changes only, which is not the same population as all incidents.
1. Start with Total time to restore service after failed changes: 9.5, Failed changes counted: 5.
2. Apply the method: Recovery time = Total restore time after failed changes / Number of failed changes.
3. This counts failed changes only, which is not the same population as all incidents.

## Common questions

### Where does this formula come from?

Deployment frequency is deployments to production divided by the length of the period; change failure rate is the share of changes to production that cause degraded service requiring remediation; failed deployment recovery time is the time taken to restore service after such a change. See the source link on this page.

### What kind of calculation is this?

The mean time to restore service following a failed deployment. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.

### What are its limits?

Arithmetic over the figures entered — it cannot tell whether the underlying monitoring, incident records or change records are complete. A mean over a short period, or over few events, is a weak description of behaviour. Covers failed changes only, so it is not interchangeable with incident mean time to repair.

### How do I use the Failed Deployment Recovery Time Calculator?

Enter the required values for Total time to restore service after failed changes, Failed changes counted. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.

### What formula does the Failed Deployment Recovery Time Calculator use?

Recovery time = Total restore time after failed changes / Number of failed changes The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.

### Can the Failed Deployment Recovery Time Calculator be used for exact decisions?

Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.

## Limitations and assumptions

- Inputs outside the supported range are rejected rather than forced into a result.
- The result depends on the values you enter for this failed deployment recovery time calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.

## Sources

- DevOps Research and Assessment, Google Cloud — https://dora.dev/guides/dora-metrics-four-keys/

## Cite this page

- APA: Free Calculator. (2026, September 16). Failed Deployment Recovery Time Calculator. https://freecalculator.tech/tools/recovery-time-calculator
- MLA: "Failed Deployment Recovery Time Calculator." Free Calculator, 16 Sept. 2026, https://freecalculator.tech/tools/recovery-time-calculator.
- Link: Failed Deployment Recovery Time Calculator — Free Calculator, https://freecalculator.tech/tools/recovery-time-calculator