Sometimes, when things go just slightly wrong (engine fails/shutdown just after departure) and no fuel dumping is desired (IE: accept the overweight landing)...the one engine out approach climb data is the first thing that is asked about.
If you check it and OK, fair enough...if you do not, however...the fleet manager may well want to know...'why not?'
Better have a good answer ready in the latter case.
Been there, done that...and checked before the approach.