I have seen people are using different approach for load combination method for occasional load case .
Like say if below is the load case
1) W+P+T ( OPE)
2) W+P+T+F (OPE )
3) W+P ( SUS )
4) L2-L1 ( OCC)
5) L3+L4 ( OCC )
6) L1-L3 ( EXP )
Then combination different method as mention bellow.
a) L4 algebraic & L5 absolute method
b) L4 scalar & L5 absolute method
c) L4 algebraic & L5 scalar method

My question is which one among three is more technically correct?