3D Printing Sensitivity Analysis Calculator FAQ
Answers to common questions about estimating 3D print costs, failure rates, material pricing, print speed, and machine operating costs.
This FAQ explains the inputs, results, assumptions, and practical uses of the 3D Printing Sensitivity Analysis Calculator. Results are estimates intended for planning and comparison rather than a guarantee of actual production cost.
General calculator questions
Basic questions about what the calculator estimates and when to use it.
What does a 3D printing sensitivity analysis calculator do?
It compares a baseline expected cost per successful print with a scenario that changes material price, effective speed, or machine cost per hour.
Who can use this calculator?
It can be used for hobby, prototype, workshop, or small-production estimates where material use, print time, and repeat attempts matter.
Can it be used before changing slicer settings?
Yes. It provides a what-if cost estimate before a setting change, but it does not predict part quality or reliability.
Does the result include profit margin?
No. It estimates selected material and machine costs. A margin or selling price would need to be considered separately.
Inputs and calculation method
Questions about the values entered into the calculation.
What should be entered for filament weight?
Enter the estimated material weight for one completed print, usually based on a slicer estimate or a measured finished print.
What can be included in machine cost per hour?
You may include electricity, maintenance, wear, depreciation, labor, or overhead according to the purpose of your estimate. Keep the rate consistent between comparisons.
How is a filament price change applied?
The calculator multiplies the baseline price per kilogram by one plus the entered percentage change.
How is a speed change converted to print time?
Baseline time is divided by one plus the speed-change percentage. A 25% speed increase changes a 10-hour estimate to 8 hours.
Why is failure rate limited below 100%?
At a 100% failure rate, no successful print is expected, so the cost per successful print cannot be calculated.
Accuracy and assumptions
Questions about factors that can cause actual results to differ.
Is the expected cost exact?
No. It is an estimate based on the inputs and simplifying assumptions. Actual material consumption, duration, stoppages, and failures can differ.
Does faster printing automatically increase the failure rate?
No. The model keeps the failure rate unchanged. If a faster setup is expected to affect reliability, enter a revised failure rate for a separate comparison.
Are partial failures treated differently from full failures?
No. Each failed attempt is treated as using the same cost as a typical completed attempt. Early failures may cost less in practice.
Does the calculator include post-processing?
Not separately. Include related labor or operating costs in the machine rate only if that suits your estimate.
Using the results
Questions about interpreting the scenario and baseline outputs.
What does a negative expected cost difference mean?
It means the scenario estimate is lower than the baseline estimate per successful print.
What does the time change result show?
It shows the estimated change in machine run time for one print attempt. A negative value means less run time.
What if the scenario reduces cost but worsens quality?
The calculation only compares selected cost factors. Quality, strength, surface finish, and process risk should be evaluated separately.
Can I use the output to quote a customer?
It can support an internal estimate, but it does not account for every business cost or pricing consideration.
How does failure rate affect 3D print cost?
The calculator divides attempt cost by the expected success rate. As failure rate rises, more expected attempts are required for each successful part.
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