Considerable attention in recent years, especially in the US, has been
paid to computer based Group Decision Support Systems (GDSS). These s
ystems expect to capitalise on the benefits provided by computers and
networks. These computer based GDSSs are heralded as being relatively
new, however systems for supporting group decision making developed in
the UK which use only manual methods and techniques have been availab
le for much longer. This paper aims to examine these two types of grou
p decision support system, and suggest a third type - that of the part
ially computer based system. The paper considers aspects of GDSS desig
n such as location, flexibility of design, levels of participation in
data capture, presentational difficulties, managing complexity of data
, client control, and management of group dynamics. By so doing the pa
per aims to demonstrate that all three types of system can benefit fro
m consideration of the other types, that each type has both positive a
nd negative features, and that some combination of all of the types co
uld provide groups with the best form of support.