How does "Wait for validation to unlock" work in an input form

How does "Wait for validation to unlock" work in an input form

@Gary Howell

Hello,

When yo select this item on the Send button in a form, the form is frozen until an unlock event.
How does the form receive notification that the linked analysis has been completed correctly or not?

I guess that it’s waiting for a field to change state but cannot find where to configure this.

Thanks
Gary