RateProof Capacity Study Prove your line can make rate, at the line.
A capacity verification study app for iPhone and iPad. Time real production cycles, stand every operation against its required rate, and hand your customer a PDF and Excel report built on the same arithmetic their capacity form uses.
$9.99, one time. No subscription, no in-app purchases, no account.
iPhone and iPad, iOS 17 or later.
What a study verifies
A capacity verification study answers one question: can this line make the parts per day the customer requires? RateProof works it out for every operation from what you measure on the floor, and it rounds requirements up and capacities down, so it never overstates what your line can do.
- Demonstrated capacity from measured cycle time, parallel machines, parts per cycle, shifts, planned downtime, changeover time, and scrap.
- A requirement per operation, raised by the scrap of the operations after it, the way a customer capacity form derives it.
- Two utilization measures, part capability and machine utilization. The higher one governs, and each operation's detail and the exported report name which one it is.
- Five risk bands: low risk below 85 percent, medium risk from 85, high risk from 90, fail at 100 percent or more, and fail with no time available when downtime consumes the whole schedule.
- The constraint operation, flagged automatically. You can pin a different one, but a hard stop or an unreadable figure still outranks your pin.
How a study runs
- Set up the line. Name the study, enter the required parts per day, and add each operation with its shifts, hours, machines, parts per cycle, downtime and scrap.
- Time real cycles. A full screen stopwatch with a giant lap button works one handed and keeps the screen awake. Every lap is saved when you tap. Undo a mistaken lap, and discard an outlier without hiding it.
- Tally the run. Record good parts, scrap and downtime hour by hour and watch the projected verdict move as the run goes.
- Export and share. The report sets planned against observed cycle time, scrap and downtime, and you share it from the iOS share sheet.
What the export contains
Paginated PDF report
The requirement, the operations table, utilization detail, the modeled capacity verdict and your notes. When the study has them, the production run tally and a cycle sample appendix in which every kept cycle is timestamped and discarded outliers stay visible, struck through.
Formatted Excel workbook
Summary and Operations sheets, plus Production Run and Cycle Samples sheets when the study has a run tally and timed cycles. Figures are real numeric cells, so your team can compute on them instead of retyping them.
Who it is for
Supplier quality engineers, quality managers, and manufacturing and process engineers who run capacity studies at a supplier's line and need the result to hold up when the customer checks the arithmetic. It replaces the laptop spreadsheet balanced on a shipping crate with a tool that fits in one hand.
Private by design
RateProof has no accounts, no advertising and no tracking, and it asks for no device permissions. Your studies are stored on your device and the app never sends them anywhere. A report leaves the app only when you share it. Anonymous usage counts and crash reports help improve the app, and you can switch them off in About. The privacy policy has the details.
Check the math first
The free capacity verification calculator runs the app's capacity math in your browser. Enter a line configuration and a measured cycle time to see demonstrated capacity, both utilization measures and the risk band before you buy.
The method, written out
Two guides set out the method the app follows: how to run a capacity verification study, from the required rate to the report your customer reads, and a capacity study template with every field, every formula and a filled example.