Trigger an escalation if 24 hours later the task has not been accepted

So here's one way to handle it:

1. put the user input task in a sub process.
2. in that sub process, from the start event, there are 2 out flows:
   1. One flow to the user task
      1. if the task is accepted, wonderful - flow out and terminate this sub process
   2. Another flow to a timer set to 24 hours.  
      1. If this process is alive for more than 24 hours flow from the timer through a script task that sets and escalation flag, flow to the end task and terminate the process
         
         1. now that you have your escalation flag set, you can trigger a new task to an escalated assignee.

Hi Robert, are you recommending something as shown below:

Hi Robert, are you recommending something as shown below: