No installation · runs entirely in your browser

Reliability Engineering
Without the Bloat

Build prediction models, RBD diagrams, FMEA worksheets, and Monte Carlo simulations — all in a single HTML file. No server. No account. No excuses.

Launch Free View Plans

Community edition is free forever · Enterprise unlocks advanced features

MIL-HDBK-217F Telcordia SR-332 IEC 62380 SN 29500 MIL-STD-975 ECSS-Q-ST-30
Capabilities

Everything You Need

From early-phase parts count to full system-level Monte Carlo — one tool covers the entire reliability workflow.

⚙
Failure Rate Prediction
Five industry-standard models with full parameter control. λ, MTBF, FIT, and R(t) computed live as you build your component tree.
Community: Parts Count Enterprise: All 5 Models
◈
RBD Canvas
Drag-and-drop SVG diagram builder with series, parallel, and k-out-of-N redundancy blocks. Path enumeration and minimal cut set analysis built in.
Community
🎲
Monte Carlo Simulation
Probabilistic reliability estimation with configurable trials, confidence intervals, and histogram visualization of time-to-failure distributions.
Community: 1K runs Enterprise: Unlimited
⚠
FMEA / FMECA
Severity × Occurrence × Detection risk priority worksheets with component linking, CSV export, and status tracking.
Community: 50 rows Enterprise: Unlimited
📊
Model Comparison
Side-by-side λ comparison across all five prediction standards for any component. See how model choice impacts your bottom-line MTBF.
Enterprise
🔧
Derating & Compliance
Automatic temperature and voltage stress checks against MIL-STD-975 and ECSS-Q-ST-30 derating guidelines per component category.
Enterprise
📐
MTBF Allocation
Distribute a system-level reliability target across subsystems using equal, proportional, or MTTR-weighted allocation methods.
Enterprise
📦
BOM Import & Library
Import CSV bill-of-materials with 16 mapped columns. Save parts to a reusable library for consistent parameters across projects.
Library: 50 parts Enterprise: Full BOM
🔄
Revision History
Commit-style snapshots with messages, timestamps, and one-click restore. Track how your reliability model evolves over the project lifecycle.
Enterprise
Getting Started

Three Steps. Zero Dependencies.

No Docker, no pip install, no node_modules. Just open a file.

1
Open the App
Click "Launch Free" above, or download the single HTML file from GitHub and open it locally. Works offline — no internet needed after first load.
2
Build Your Model
Create a project, add systems, subsystems, boards, and components. Set categories, operating conditions, and the tool calculates λ, MTBF, and availability in real time.
3
Analyze & Export
Run Monte Carlo simulations, build RBD diagrams, generate FMEA worksheets. Export prediction CSVs, HTML reports, or save your full project as JSON.
Pricing

Simple, Honest Pricing

Community is free forever. Enterprise unlocks the full professional toolkit.

Community
$0/ forever
Perfect for students, hobbyists, and teams evaluating the tool.
Launch Free
  • ✓RBD canvas with series/parallel blocks
  • ✓MIL-217F Parts Count prediction model
  • ✓Monte Carlo simulation (1,000 iterations)
  • ✓FMEA worksheet (50 rows)
  • ✓Component library (50 parts)
  • ✓Up to 3 projects / 3 RBDs each
  • ✓JSON save/load + Prediction CSV
  • ✓Dark/Light themes · Fully offline
Enterprise
$49/ month
For professional reliability engineers and regulated industries.
Get Enterprise
  • ⚡Everything in Community, plus:
  • ⚡All 5 prediction models + comparison
  • ⚡Unlimited projects, RBDs, components
  • ⚡Monte Carlo — unlimited iterations
  • ⚡FMEA — unlimited rows
  • ⚡k-out-of-N redundancy blocks
  • ⚡MTBF allocation (3 methods)
  • ⚡Mission profile · Derating · QPL/QML
  • ⚡BOM import · Spares optimization
  • ⚡Revision history · Print-to-PDF

Prices in USD. Annual billing available at 2 months free. Cancel anytime.

Ready?

Start Building in 10 Seconds

No sign-up required for Community edition. Just open and go.

Launch IRBD