Commercial Production Guide
Downtime: Log It, Don't Guess It
Downtime is the machine's unused hours, and it leaks capacity silently because nobody writes it down. This guide defines the downtime categories, explains why logging beats guessing, and provides a printable blank log with date, machine, duration, category, cause and action.
Category: Downtime & Maintenance
Print the blank log and keep it at the machine. Fill one row per downtime event; keep categories consistent so monthly totals mean something.
The Downtime Categories
Categorize every logged event so patterns become visible:
- Maintenance. Scheduled maintenance windows and repairs.
- Pump. Pump problems, oil changes or pump-related delays.
- Refrigeration. Cooling system issues that extend or interrupt cycles.
- Cleaning. Cleaning and defrosting time beyond the norm, or forced by a previous run.
- Power. Outages, breaker trips or supply interruptions.
- Scheduling. Machine idle because prep, product or labor was not ready.
- Supply shortage. No product, no packaging, or no materials to run the planned batch.
Log it rather than guessing it
Guessed downtime is usually remembered as smaller than it was. A simple log entry (date, machine, duration, category, cause, action) turns 'the machine is down a lot' into 'we lost six hours to pump events this month', and that is when the fix gets obvious.
The Blank Downtime Log
| Date | Machine | Duration | Category | Cause | Action Taken |
|---|---|---|---|---|---|
Blank downtime log: record one entry per event
Print one row per downtime event. Consistent categories make the monthly totals meaningful. Nothing here is pre-filled; the log is a record, not a prediction.
Reviewing the Log
A log pays off when it is reviewed:
- Sum the hours by category each month; the largest category is the cheapest place to start.
- Ask why, not just what: scheduling downtime often hides a prep or packaging bottleneck.
- Check recurring events against the preventive maintenance guide.
- Include downtime in capacity math: the machine's available hours shrink by what the log shows. See batches per week.
Downtime feeds the metrics
Downtime is one of the core metrics of the production dashboard, and the production metrics guide shows how the logged hours become the utilization number.
Record Header
Frequently Asked Questions
How detailed should a downtime entry be?
Brief but complete: date, machine, duration, category, one-line cause and the action taken. Detail enough to reconstruct the event, short enough that it actually gets filled.
Should scheduled cleaning count as downtime?
If the machine is not producing, the hours are not producing. Category them as cleaning and let the review decide whether the cleaning time is reasonable for the products run.
What if downtime is rarely logged?
Start with one sign on the machine and a one-minute habit: fill the line as the event ends. A partial log is still more honest than no log.
Key Takeaways
- Categorize downtime: maintenance, pump, refrigeration, cleaning, power, scheduling, supply shortage.
- Log date, machine, duration, category, cause and action; guessing underestimates the loss.
- Review monthly totals by category and feed the hours into capacity and utilization math.
Related Guides
Continue through the Commercial Production Center with these related guides.