Invited Paper -- Performance Evaluation with Heavy Tailed Distributions -- Queueing Network Models -- Layered Modeling of Hardware and Software, with Application to a LAN Extension Router -- Object Allocation for Distributed Applications with Complex Workloads -- A Set of Tools for Traffic Modeling, Analysis and Experimentation -- Queueing Analysis of Pools in Soft Real-Time Systems -- Xaba: Exact, Approximate, and Asymptotic Solvers for Multi-class Closed Queueing Networks -- Decomposition of General Tandem Queueing Networks with MMPP Input -- Exact and Approximate Solutions for a Class of Infinite Markovian Models -- Performance Evaluation of a Distributed Enterprise Data Mining System -- Optimisation in Mobile Networks -- Minimization of the Impact of Subscriber Mobility on the Resources of a GSM Network -- Optimal Allocation Policies for Mobile Agents -- Stochastic Petri Nets -- Iterative Analysis of Markov Regenerative Models -- Analysis and Evaluation of Non-Markovian Stochastic Petri Nets -- Petri Net Modelling and Performability Evaluation with TimeNET 3.0 -- Integrating Synchronization with Priority into a Kronecker Representation -- Simulation -- Implementation of Importance Splitting Techniques in Stochastic Petri Net Package -- FluidSim: A Tool to Simulate Fluid Models of High-Speed Networks -- Formal Methods and Performance Evaluation -- Exploiting Modal Logic to Express Performance Measures -- Derivation of Petri Net Performance Models from UML Specifications of Communications Software -- Measurement Tools and Applications -- Scalability of a Workstation Cluster Architecture for Video-on-Demand Applications -- Multilayer Online-Monitoring for Hybrid DSM Systems on Top of PC Clusters with a SMiLE -- Design and Implementation of a Tool for Measuring the Performance of Complex E-commerce Sites -- Tool Descriptions -- FiFiQueues: Fixed-Point Analysis of Queueing Networks with Finite-Buffer Stations -- Galileo: A Tool for Dynamic Fault Tree Analysis -- Möbius: An Extensible Tool for Performance and Dependability Modeling -- MRMSolve: A Tool for Transient Analysis of Large Markov Reward Models -- Calculation and Use of Peaking Factors for Remote Terminal Emulation -- Reliability and Performability Modeling Using SHARPE 2000 -- The Simalytic Modeling Technique: Overview for Application Performance Analysis -- SPNP: Stochastic Petri Nets. Version 6.0 -- SREPT: Software Reliability Estimation and Prediction Tool -- STEADY - A Tool for Predicting Performance of Parallel DBMSs -- The TANGRAM-II Environment -- Implementing Symbolic Models for Value Passing in TwoTowers -- Monitoring Application-Level VoIP Grade of Service at a PSTN-IP Network Gateway -- ? Prof-SDL: A Tool for Identifying Performance Bottlenecks of Software Architectural Design.