Load case combination method for occasional load case

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?

Refer the link below from COADE animated Tutorials and the slide static Load case setup/Modification

http://www.coade.com/support_tutorial.asp

Dear shr,

Simply go to the link below and download the pdf file there. Go to relief valve case by considering F1 only for example.

http://www.coade.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=19854&page=2#Post19854

Thanks Mani & Samsul

From the document Samsul mention I find the Option a & option c as I mention in my previous post will give the same result, occasional stress point of view.
Yes I personally checked one file it gives same stress. So both the option can be used.

Thanks & Regards

Habib

i think,absolute and scalar combination is the same when calculate stress,cause stress >1.so your a=c,while for b31.1,scalar combination is required for check the occ stress.