ANALYSIS TYPE / 09
System Reliability · Availability · Redundancy Architecture
Overview
Reliability Block Diagram (RBD) analysis models the logical dependencies between system components to evaluate overall system reliability, availability, and safety integrity — particularly useful for redundant, parallel, and standby system architectures. Our RBD models are calibrated against failure rate databases and mission profiles, enabling accurate prediction of system availability, maintenance interval optimisation, and comparative evaluation of alternative redundancy architectures against reliability and cost targets.
Industries Served
Standards
Key Aspects
Modelling component interdependencies in series (all must work), parallel (any can work), and standby (backup activates on failure) configurations to compute system-level metrics.
Computing the probability that the system performs its required function over the specified mission time — accounting for component failure rates and repair times.
Calculating steady-state and time-dependent system availability — critical for safety systems with maintenance intervals and proof-test requirements.
Comparing alternative redundancy architectures (1oo2, 2oo3, hot standby) against reliability and cost targets to select the optimal safety architecture.
Connect with our functional safety team to define the right approach, timeline, and tooling for your project.
