Machine Downtime Log & MTBF/MTTR Template
Logs downtime events with minutes lost, works out MTBF and MTTR per machine and ranks unplanned minutes by reason on a Pareto sheet.
Machine Downtime Log & MTBF/MTTR Template is a free Excel workbook: 4 sheets, 279 live formulas and realistic sample data throughout, 19 KB as .xlsx.
The formulas are printed on this page, unedited, so you can check the method before downloading anything. Swap in your own numbers and the whole file recalculates — which is the part no chat window can hand you. Opens in Excel, Google Sheets, Numbers and LibreOffice; no add-in and no macro.
A look inside
This is a real slice of the Events sheet from the actual file — not a screenshot, and not a mock-up. Cells shown in violet are live formulas, exactly as they arrive.
| # | Machine | Start | End | Reason | Planned? | Notes | Minutes |
|---|---|---|---|---|---|---|---|
| 2 | Filler 2 | 2026-09-01 15:29:13.005804 | 2026-09-01 15:48:13.005803 | Operator unavailable | N | Awaiting fitter | =ROUND((C2-B2)*1440,0) |
| 3 | Labeller | 2026-09-01 23:48:15.122257 | 2026-09-02 01:48:15.122258 | Mechanical failure | N | Recipe change | =ROUND((C3-B3)*1440,0) |
| 4 | Labeller | 2026-09-02 11:21:11.461639 | 2026-09-02 11:37:11.461639 | Operator unavailable | N | Awaiting fitter | =ROUND((C4-B4)*1440,0) |
| 5 | Conveyor | 2026-09-02 15:26:21.811984 | 2026-09-02 16:03:21.811984 | Mechanical failure | N | Guard interlock | =ROUND((C5-B5)*1440,0) |
| 6 | Filler 1 | 2026-09-03 00:23:31.794633 | 2026-09-03 01:04:31.794633 | Operator unavailable | N | Bearing replaced | =ROUND((C6-B6)*1440,0) |
| 7 | Labeller | 2026-09-03 04:37:33.124539 | 2026-09-03 05:12:33.124539 | Electrical fault | N | Awaiting fitter | =ROUND((C7-B7)*1440,0) |
| 8 | Filler 1 | 2026-09-03 10:16:02.258870 | 2026-09-03 10:48:02.258870 | Sensor fault | N | Awaiting fitter | =ROUND((C8-B8)*1440,0) |
| 9 | Filler 2 | 2026-09-03 15:05:52.389850 | 2026-09-03 15:36:52.389849 | Electrical fault | N | Recipe change | =ROUND((C9-B9)*1440,0) |
What’s in the file
What it explains
- MTBF and MTTR answer different questions
- Planned time is not lost time
- Minutes, not events
Download it
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