Batch Completion Time Calculator

How the batch completion time calculator works

Whole batches = ceil(required units ÷ units per batch). Parallel waves = ceil(batches ÷ identical machine count). Each machine handles at most one batch in a wave; all batches use the same cycle, including a partly filled final batch.

Elapsed time for positive demand is one setup delay plus waves times processing plus sequential handling minutes. Aggregate machine minutes count batch cycles without setup. Zero demand suppresses setup and processing; zero elapsed time makes average hourly output unavailable.

This simple wave schedule does not model queues, staggered starts, shared labor, overlapping handling, variable batch times or failures. It is separate from takt or OEE. Vorne provides production-time context; the synchronized-batch convention is this tool’s explicit planning assumption.

Worked example

1,000 units in 250-unit batches require four batches. Two machines process those in two waves. At 30 processing plus five handling minutes per batch and 20 elapsed setup minutes, completion takes 90 minutes. Increasing demand to 1,250 units requires five batches, three waves and 125 minutes.

Sources and assumptions

The source material explains the underlying calculation or pricing structure. Entered prices, costs, schedules and scenario choices are your assumptions; this tool does not obtain supplier quotes or predict actual results.

• Vorne: production time, stop losses and cycle relationships