Measured-extrema screening record
Form-control measurement span
Inputs
Choose the form category represented by the user-entered measurement record.
Minimum value from the declared measurement record and setup.
Maximum value from the declared measurement record and setup.
Drawing or study tolerance entered only to display an observed-span ratio; no compliance result is generated.
Results
Observed flatness extrema span
0.044
Observed span / stated tolerance
88
%Observed screening span = user-entered xmax − user-entered xmin
A first-pass number, not a code check, certification, or approval. Read the method and its limits below. What this is and is not.
Nearby: ISO 286 fits · Tolerance stack · Position deviation · MMC bonus & virtual condition
Method
Formula, when it applies, and when it does not
Report the measured-extrema span for a flatness, straightness, circularity, or cylindricity screening record.
Observed screening span = user-entered xmax − user-entered xmin
When
- User-declared control type
- User-provided extrema
- Single declared unit
- No minimum-zone reconstruction
Don’t
- This subtracts user-entered extrema for a declared form-control record. It is not a minimum-zone algorithm and does not validate sampling density, filters, instrument calibration, probe compensation, datum/setup strategy, part geometry, drawing interpretation, uncertainty, or compliance.