Task Manager: Task Type "Run Business Rule": How can users perform the task of launching the rule?

Summary:

Task Manager: Task Type "Run Business Rule": How can users perform the task of launching the rule?  

Content (required):

We set up a task of type Run Business Rule (which is of execution type: Process Automation) : Problem: when I schedule the task to be due for today, 1st Juli from 11 AM to 11 PM and save it, the businessrule get's immediately executed - no waiting for any userinteraction - there is no task type "Run Business Rule" of Execution Type "End User"

We are used to the old Tasklist concept: There I define a task of type Businessrule - and the user launches the rule and then confirms, that the task is complete - this is what we want to do in TaskManager now (with the additional features offered there)