This paper discusses service creation tools and the benefits which the
se tools can deliver. The BT VISAGE (voice interactive services applic
ation generation environment) service creation tool is used as a speci
fic example and is described in some detail. VISAGE is currently used
within BT to generate advanced network-based services, an example of t
his being the network-based call-answering service 'CallMinder' which
runs on the interactive speech applications platform (ISAP).