SAP QM Inspection Workload and FTE Calculator
How many inspectors does incoming and in-process inspection need? The answer is lots times work per lot, reduced by what dynamic modification lets you skip. This calculator makes that arithmetic explicit and shows how skip rules change the headcount.
Your numbers
Count of lots created per month, for example from QA32.
Average inspected characteristics, counting sample units if each is measured.
Measurement time including reading and recording.
Lots released with no inspection under skip rules. Skipped lots still need a usage decision in most setups.
Your results
Planning estimate from the inputs you provide. It does not model peaks, rework, retests or training time.
Inspection hours vs skip rate
Sweeps Share of lots skipped by dynamic modification from 0 to 90, holding your other inputs fixed.
Measure inspection workload from SAP
Optional follow-up on reporting actual inspection lot volume and effort from your QM data.
Optional. The tool and every export work without this. No spam.
How to use it
Take lots per month from your QM lot list and the average characteristic count from your inspection plans. Estimate time per characteristic from a short time study. Set the share of lots skipped under your dynamic modification rules and the productive hours per inspector, after breaks, training and meetings. The result is hours, FTE and monthly cost.
- Use a representative month, not a peak
- Time a few typical lots to set minutes per characteristic
- Keep productive hours realistic, often 120 to 140 per month
- Run the calculation per plant or per inspection type for better accuracy
The formula
Minutes per inspected lot equals characteristics times minutes per characteristic plus setup plus review time. Inspected lots equal total lots times one minus the skip share. Total hours are inspected lots times minutes per lot divided by 60, plus the review time for skipped lots. FTE equals hours divided by productive hours per inspector. Savings from skipping equal skipped lots times inspection and setup time.
Reading the chart
The line shows monthly inspection hours as the skip share rises. It falls linearly, because the model treats each skipped lot as saving the same work, but real savings depend on which lots qualify. Skip rules depend on the quality level of each vendor and material, so the savings arrive slowly after rules are introduced and stop if quality drops.
Common mistakes
Assuming all lots qualify for skipping from day one. Ignoring walk, queue and material handling time in the minutes per characteristic. Forgetting that quality level resets after a reject. Using the result to cut staff without checking the effect on escapes and vendor performance.
Frequently Asked Questions
Where do I get lots per month?
From the inspection lot list in QM, for example transaction QA32 filtered by plant, creation date and inspection type. Count lots created, not lots closed, if you want the workload to arrive.
How realistic is the skip rate?
Start with the share of lots that already qualify under your rules, for example vendors with a long record of accepted lots. A rate higher than that is a target, not a forecast.
Does it include sampling?
Sample size is part of characteristics and minutes. If a lot needs five sample units at 12 characteristics each, enter 60 characteristics or an equivalent total.
Can I use it for final inspection?
Yes. Replace setup and review with your final inspection overheads, and set skip to zero if your customers require every lot to be inspected.
If you want inspection workload tracked from live QM lot data rather than estimates, Netray can help you set up that reporting.
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