Finance asks if automation pays by comparing “machine cost” to “operator wage.” Wrong from the start—not bad payroll math, but because a manual station’s real cost never fits one salary line. Repeat-labor stations often have citable numbers in buyer literature.
Published evidence bands (palletizing and repeat-labor stations)
| Metric | Published band | Source |
|---|---|---|
| Injury rate | About 2–3× manufacturing average | Robotomated palletizing guide |
| Single back-related claim | Often $35,000–$75,000 order of magnitude | Same |
| Dedicated palletizer turnover | Above 150%/year not rare | Same |
| Robot hardware share of project | About 25–50% | AMD Machines · TCO |
| Cobot payback (single / multi-shift) | Often 12–24 / 8–14 months | Robotomated cost guide |
Map the bands to your EHS, hiring, and shift ledgers—published ranges are not contract KPIs, but they break “one wage line” into numbers a steering meeting can discuss.
The hidden invoice of manual work
Repeat pick-and-place, load/unload, fastening, visual check—different titles, similar structure:
Training and churn — competence in weeks, quit before peak stabilizes
Consistency — Monday vs Friday, day vs night—sometimes the 2% you cannot explain in a customer complaint
Speed ceiling — people can be urged, not duplicated; overtime hits legal, physical, and retention limits
Space and takt — wait, hand off, talk—seconds not on standard sheets, but in Cpk
Those costs sit in five departments, so no meeting is shocked by one “manual bill.” Automation front-loads spend, so it looks loud. Published TCO work also notes hardware is often only 25–50% of a robot project (AMD Machines · TCO)—comparing arm price to one wage line distorts both sides.
When “flexibility” is an illusion
Manual’s strength is fast changeover—but if the same motion repeats two thousand times a day for six months, you pay a premium daily for a rare event. Test: in the last twelve months, did this station stop more for changeover or people variance?
How automation should be compared
A fairer frame is two paths side by side—full checklist in the ROI guide:
Manual path: wages + overtime + training + scrap + peak turn-down + injury/turnover drag
Automated path: depreciation + integration + maintenance + changeover prep + remaining labor (teach, patrol)
Published buyer bands often cite cobot payback around 12–24 months (single shift) and 8–14 months (multi-shift) (Robotomated cost guide)—run pessimistic/base/optimistic integration budgets and see if break-even still fits.
People are not deleted
Automation takes the slice that is repetitive, provable, and unfriendly to joints. People remain for exceptions, replenishment, first article, and customer process dialogue.
Common questions
What is wrong with wage ×12 vs arm price?
How do injury numbers enter ROI?
Is automation always cheaper than manual?
Seeing manual’s real price takes more courage than reading an arm quote.
