Latest Finish Date is calculated based on the value visible in the Latest Finish Date Calculation field on the Work Order Plan.
When the user is creating an One-off Work Order - the Latest Finish Date cannot be changed. When the user is calculating Work Order directly from the Work Order Plan card - the Latest Finish Date cannot be changed. When the user is using Planning Worksheet - the Latest Finish Date can be changed - the relevant field is hidden by default.
The Latest Finish Date cannot be set up before the Original Planned Date.
After creating a Work Order - the Latest Finish Date is added to the record. The relevant field is hidden by default.
When the Work Order is closed - the Latest Finish Date is also added to the Posted Work Order.