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I think I have a far clearer understanding now.....
One last thing to think about is the reason you want random numbers. I
don't recall seeing the business case for the random number, but if it's
for something like selecting truck drivers for 'random' drug testing you
ought to be advised that CEERAN0 doesn't necessarily have as long a
sequence as we might like.
CEERAN0 generates it's numbers via an algorithm, which makes it
pseudo-random. That is, it appears to be random. But if you track the
numbers long enough, you'll find that the sequence starts all over again
from the beginning. How long that takes is the sequence length.
Read this IBM page (Thanks Bruce Vining!) for an alternative API that
has a longer sequence than CEERAN0.
http://www-912.ibm.com/s_dir/slkbase.NSF/0/00599805bfa9117f86256c48005989f6?OpenDocument
I had to do this very thing in Ye Olde Days. I used the October 1988
issue of Communications of the ACM, article on random numbers authored
by Stephen K Park and Keith W Miller as the basis of my routine (which
held up in court, as it turned out.)
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