In GroundControl, you can add tolerances to each characteristic in your FAIR. We will show you pass/fail hints based on the tolerances you enter, and you can choose to automatically add tolerances to the Requirement field in your Form 3 export.
Automatic tolerance recognition
If we detect that a tolerance is present in the bubble selection, we will automatically pre-fill tolerance fields in the characteristic panel. If we see a bubble selection like this:
We will automatically pre-fill the fields as shown below:
You can then enter your result for a pass/fail hint.
💡 You can also hover your cursor over the Result field to see a tooltip describing the pass/fail.
Default tolerances
You can set default (general) tolerances in the FAIR — usually these are described in the title block — which will also be used to pre-fill tolerance fields for your characteristic wherever possible.
Open Form 3, and look for a “Default Tolerances” button near the top left of the page. Clicking here will open a window to enter default tolerances.
Any new bubble containing a measurement will be checked against these default tolerances. If there is a default with a matching unit and precision, it will be pre-filled in the characteristic.
If you change the default tolerances, existing characteristics will not be affected, so you don’t have to worry about making changes accidentally.
The unit in the first row of the defaults is also used as the default unit for the whole FAIR. This means that when you bubble a new measurement, the unit used for validation checks is assumed to be the unit in the first row here, and is pre-filled on the characteristic panel.
Fallback defaults
If you set the precision of a default to 0, it will be used to pre-fill a measurement of any precision with the same unit, but only if no other default matches exactly.
If you set the unit of a default to empty, it will be used to pre-fill a measurement of any unit with the same precision, but only if no other default matches exactly.
If you set the precision to 0 and the unit to empty on the same default, that default will pre-fill any measurement as long as no other default matches.
Note that these fallback rules are applied in the order listed above, which means if there are multiple fallback defaults that could apply, they will apply in this order.
Default Tolerances In Action
Let's look at an example of the default tolerances in action. Entering the defaults above and adding a new bubble with a selection like this:
Will create a characteristic with tolerance fields pre-filled like this:
Manual tolerance entry
All tolerance fields can be edited manually, and any edits apply only to the characteristic you are editing. If no tolerances are pre-filled, you can click the checkbox next to “Tolerance?” to enable tolerances manually.
Click the toggle to switch between bilateral and limit tolerances.
Units are made consistent wherever possible. Units can be mixed in certain cases and conversion will be applied. A percent tolerance can be used on any unit.