We had three fuel calculations on the paperwork OAK-HNL.
1. How much fuel we needed to fly the leg plus alternate and reserve - almost irrelevant except to plan a landing weight.
2. How much fuel we needed to get to the ETP, lose an engine, drift down and keep going in the middle 20 thousand levels.
3. How much fuel we needed to get to the ETP, decompress, dive to 10,000 and press on with all engines.
Number three was always the highest number. If we decompressed AND lost an engine I think we had a wet footprint in the middle.