Every Document in OneOfficeERP has an option called 'Assign To' in the side-bar. Using this option, any Document can be assigned to the user. The User would be assigned a ToDo simultaneously.
Under such conditions, the three ToDo statuses are defined as per the updates on the assignment.
Let's consider a scenario where a ToDo is assigned via an Issue. Let's say that there are 2 levels of Support in an organization L1 and L2 and every new support ticket is considered as an L1 support issue and assigned to relevant team members. In this case, the ToDo statuses would vary as follows:
In the same scenario as above, let's say that the support ticket was marked close by an L1 support team member. However, the ISsue gets reopened if the ticket is reopened again, or there was an activity in this issue
Simultaneously the ToDo associated with the Support Ticket will also be reopened.