fhere is a growing perception that the succesful design and xploitation of complex information systems is critically dependant on: he level of methods and support for performance modelling. Fast: echnological evolution creates a strong demand for analysis: echniques which can handle new hardware and software )rganisations. Performance modelling users are expecting improved: ools in terms of their user friendliness and their integration in the;ystem design and operation process. Providing an image as clear as possible of the recent advances in: hese areas is the objective of the serie of In t...