At times, you might need to change an event to a gate or a gate to an event. For this example, assume that rather than completing the logic for the Ext Fault OR gate at this time, you want to change it to an undeveloped event, indicating that you will come back later and more fully analyze this particular failure path. This type of failure can be caused by such events as the tablet PC being dropped, or someone spilling coffee on it. For now, however, you want to leave this branch open-ended and return to develop it later, when you have more information.