Mobile information and communication systems in clinical routine have the p
otential to greatly improve communication, facilitate information access, e
liminate double documentation, and increase quality of patient care in the
long run. Projects to date have focused, for the most part, on highly speci
alized applications of the mobile computer. In our research project, 'Coope
rative Problem Solving in Health Care', we have, among other things, design
ed a multifunctional mobile information and communication assistant. A prot
otype version of this system was implemented. This article outlines the clo
se-to-reality evaluation of our prototype in a 1-week simulation study in a
Heidelberg University hospital. We describe methods, aims, design and resu
lts of the simulation study, as well as discuss our methodology and the res
ults we have obtained. We argue that the diverse requirements of different
professional groups cannot be fulfilled by a single multifunctional device
and propose, therefore, a 'multi-device mobile computer architecture'. Fina
lly, we present consequences for the future computing infrastructure. (C) 2
000 Elsevier Science Ireland Ltd. All rights reserved.