This paper describes work being undertaken as part of the IERAPSI
(Integrated Environment for the Rehearsal and Panning of Surgical Intervention)
project. The project is focussing on surgery for the petrous bone, and brings together
a consortium of European clinicians and technology providers working in this field.
The paper presents the results of a comprehensive user task analysis that has been
carried out in the first phase of the IERAPSI project, and details the current status of
development of a pre operative planning environment and a physically-based surgical
simulator.