Measure how much of an established safety-inventory buffer was actually consumed during a reporting period. The calculator distinguishes used buffer from untouched capacity and shows how many days of average demand the remaining safety stock can still support.
Utilization indicates the share of the defined buffer that was called upon. It should be interpreted alongside the cause and duration of the disruption, not as a standalone performance grade.
Consumption above the available buffer is rejected because it represents shortage demand rather than safety inventory use. Record unmet demand separately.
If 180 of 600 safety units are consumed, utilization is 30.00% and 420 units remain. At 120 units per day, the remainder provides 3.5 days of average-demand coverage.
Count units only after normal cycle stock has been exhausted and the designated buffer begins covering demand.
No. Demand beyond the available safety buffer is a shortage and should be tracked separately.
Not by itself. A quiet period may simply have had no disruption; review utilization across enough cycles and scenarios.
Remaining units are divided by the entered average daily demand.
Use a consistent measurement window. If the buffer was replenished during it, either split the period or include only units genuinely available for the event being analyzed.
| Input | Unit | Role |
|---|---|---|
| Safety inventory available | units | Buffer units available at the start of the measured event or period. |
| Safety inventory consumed | units | Buffer units used after regular cycle stock was exhausted. |
| Average daily demand | units/day | Consumption rate for translating the remainder into coverage days. |