AvSim+ is a powerful availability and reliability simulator capable of analysing complex and dependent systems efficiently and accurately. AvSim’s algorithms have been developed and enhanced over the past 15 years by Isograph’s experienced team of reliability engineers, mathematicians and programmers. AvSim+ capabilities extend far beyond analysing the availability and reliability of complex systems. The program’s Weibull, spares tracking (through multiple echelon levels) and task management functions allow users to implement a Reliability-Centred Maintenance (RCM) strategy aimed at reducing costs, optimising availability and managing planned maintenance tasks.In AvSim+ the logical interaction of failures, and how they affect system performance, are modelled using a network diagram or fault tree. These diagrams may be used to model failure and success or levels of throughput in the system. Consequences are then assigned to any level of the logical diagram to indicate the effects of failures (financial, operational, safety and environmental). Labour, spares and failure data may be imported or directly entered into the program together with any operational phase information and task group assignments. AvSim+ will then analyse your system using efficient Monte Carlo simulation algorithms to provide availability and reliability parameters, life cycle costs, importance rankings etc. You may also optimise spare holdings and planned maintenance intervals.All this information may be reported in standard (or custom) graphs and text reports or exported to your database or spreadsheet application.