What this calculator solves
Use Prep Batch Time for repeatable unit preparation that has a setup, a seconds-per-unit run, and a separate quality-check allowance. It suits labeling, folding, bagging, or component preparation before final packing. Order Packing Time instead models completed orders in minutes per order.
How to choose the inputs
Define one prepared unit clearly, time several normal run segments in seconds, and separate setup activities that happen once. Enter quality-check time for the whole batch, not per unit, unless the per-unit observation already includes it.
| Input | How to prepare it |
|---|---|
| Batch units | Prep Batch Time Calculator: Count batch units in the exact operating unit shown on the dispatch or inventory record; do not mix eaches, packs, cases, or layers. |
| Seconds per unit | Prep Batch Time Calculator: Observe several cycles for seconds per unit, then use a representative pace rather than the single fastest cycle. |
| Setup minutes | Prep Batch Time Calculator: Time setup minutes across representative normal work and separate setup, exceptions, and breaks unless the definition includes them. |
| Quality check minutes | Prep Batch Time Calculator: Time quality check minutes across representative normal work and separate setup, exceptions, and breaks unless the definition includes them. |
How the calculation works
- Validate the Prep Batch Time Calculator manifest: confirm that batch units, seconds per unit, setup minutes describe the same Prep Batch Time Calculator pack, batch, or planning period.
- Calculate preparation time: apply Batch time = setup + checks + units × seconds per unit ÷ 60 without rounding intermediate values for Prep Batch Time Calculator.
- Review the preparation time breakdown: use the primary result for the stated decision and the secondary values to identify the input or constraint driving this Prep Batch Time Calculator result.
Worked example
Preparing 250 units at 35 seconds each plus 35 minutes of setup and checks takes about 180.8 minutes.
Next action: After: feed prepared-unit availability into kitting or order packing schedules.
How to interpret the result
Review setup and run time separately. A short batch with high setup share may benefit from campaign scheduling; a long batch is more sensitive to seconds per unit. Do not remove checks simply to improve the calculated time—change the approved method only after a controlled trial.
Common mistakes
- Mixing seconds per unit with minutes.
- Counting setup inside the cycle and again in setup minutes.
- Using finished-order count when several prepared units enter one order.
- Ignoring changeovers between versions or materials.
Assumptions and limitations
The tool assumes one setup, constant cycle time, and a single batch-level check allowance. It excludes interruptions, rework, queueing, fatigue, equipment downtime, and variable component availability.
Related workflow
- Before: define unit, batch boundary, setup, and check plan.
- After: feed prepared-unit availability into kitting or order packing schedules.