is infinitely preferrable to flight with those MORONIC BLOODY IDIOTS who would follow the normal SID following engine failure.
While it will not happen "reguluarly", provided that the OEI
in all segments keeps the aircraft above the SID profile then this meets the requirement that if you can you follow the departure clearance - it is also already in the FMS!!
The "idiots" are the ones who either;
a) simply compare second segment climb to sid gradient and forget (ignore) the level 3rd segment which will put them below the SID
b) will schedule segment 3 at 6000ft (London) when you can't get there within 5 mninutes never mind accelerate to clean.
c) limit take-off weight to enable the sid to be followed when the only reason for increased climb gradient is airspace but they can't be bothered to check the obstacle requirement.
d) claim that it is unsafe to follow the side due to close-in obstacles. If it is safe to follow the SID minimum gradient with all engines then flying far enough above it OEI to make room for an acceleration segment is just as safe (some would say safer!!)
e) Never bother to check what the actual altitude will be when the net altitude is 1500ft. Or expect the aircraft to accelerate at a net altitude of 1500ft but tell the pilots to accelerate at 1500ft + airfield elevation as indicated on the altimeter.
The most important thing about an OEI lateral procedure is that it must be either in the fms or very very very simple.