February, 2003
© 2000, 2001
Scott S. Emerson, M.D., Ph.D.
Unifying
parameterization for the most commonly used group sequential designs
(Kittelson & Emerson, 1999)
Rich
parameterization facilitates search for stopping rule
appropriate for specific applications
Inclusion
of broad spectrum of designs means that comparisons within this family
will consider full range of possible designs
(Default family in
S+SeqTrial)