Examples
Examples
Try the starting example
- Belt width log JSON [odometer km,measured width mm]
- [[0,20],[1000,19.8],[2000,19.6]]
- Supplied minimum width limit (mm)
- 18
- Current width margin (mm)
- 1.6
- Observed OLS width trend (mm/km)
- -0.0002
- Current supplied-limit status
- At or above supplied limit
- Projected odometer at limit (km)
- 10,000
Try another scenario
- Belt width log JSON [odometer km,measured width mm]
- [[0,20],[1000,19.5],[2000,19]]
- Supplied minimum width limit (mm)
- 18
- Current width margin (mm)
- 1
- Observed OLS width trend (mm/km)
- -0.0005
- Current supplied-limit status
- At or above supplied limit
- Projected odometer at limit (km)
- 4000
Calculation method
Calculation method
Current width margin (mm)
lastMeasuredWidth-suppliedMinimum.
Observed OLS width trend (mm/km)
OLS width slope versus mileage.
Current supplied-limit status
Below supplied limit or At or above supplied limit.
Projected odometer at limit (km)
If slope<0 and currentWidth>=limit: lastMileage+(limit-currentWidth)/slope; otherwise explicit no-forward-estimate status.
Symbols and units
- a
- Belt width log JSON [odometer km,measured width mm]
- b
- Supplied minimum width limit (mm)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Measurement trend conditional on linear continuation; no replacement interval, belt compatibility or safe serviceability assessment. Supplied minimum width is not inferred. Supported limits: 2..1000 increasing unique odometers>=0; positive widths; limit>0; same belt and measurement convention.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.