Reliability Block Diagram (RBD) Tool
Model series, parallel, and standby system reliability configurations. Calculate equivalent MTBF and system failure rates online.
Core Formula
Series: Rs = R1 × R2 × ... × Rn | Parallel: Rp = 1 - (1-R1)(1-R2)...(1-Rn)
Governing Standards
- IEC 61078 — Reliability Block Diagrams
- IEEE 493
Frequently Asked Questions
When should I use RBD vs Fault Tree?
RBD models success paths (what must work). Fault Trees model failure paths (what can go wrong). Use RBD for system design optimization; use FTA for safety and risk analysis.