I am sure that the thing that puzzles many of us is the idea that one could arrange a suicide and not do it fairly quickly after the point of no return.
Would you really stand on a parapet and think "I will jump off in 7 hours time and in the meanwhile I will sit on this ledge so no-one can see me."?
This type of behaviour must be well outside of that expected by a person committed to suicide.
I refer you to my post #4095 and Jonathan3141's post #4108. Suicide is a complex issue, and a long delay is not unusual.