The cycle

JohnsonB Systems

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About this app

The Cycle helps engineering managers plan, monitor and report on the life cycle of safety-critical systems and their subsystems — from concept and requirements through verification, validation and decommissioning.

Designed around the V-model and recognised industry standards, it turns complex life-cycle tracking into a clear, visual workflow you can manage from your phone or tablet.

BUILT AROUND RECOGNISED STANDARDS
- CENELEC EN 50126 — railway RAMS V-cycle
- CENELEC EN 50128 — railway software
- IEC 61508 — functional safety (12-phase and full 16-phase)
- ISO/IEC/IEEE 15288 — systems engineering
- DO-178C — airborne software
- ISO 26262 — automotive functional safety
- ISO 9001 — quality management
Or build your own custom life-cycle from scratch.

KEY FEATURES
- Live progress view for each system and its linked subsystems
- Interactive V-cycle visualisation
- Start from a standard with inputs/outputs pre-filled, or define custom phases
- Integrity-aware assurance evidence (SIL / DAL / ASIL), reflected per phase
- Record completion evidence with documentation references
- "What's missing" view that lists outstanding items and jumps straight to them
- PDF reports at High / Mid / Low detail, scoped up to any phase
- Import and export cycles to share with your team
- Works fully offline — your data stays on your device

WHO IT'S FOR
Engineering managers, RAMS and safety engineers, systems and V&V engineers, and quality/assurance teams in railway, industrial, automotive and aerospace projects who need a fast, structured way to track and evidence life-cycle progress.

PRIVACY FIRST
No account required. No tracking. No ads. All your project data stays on your device.

PLANS
Starter (free): one system with up to three subsystems, using custom cycles.
Pro (subscription): unlimited systems and subsystems, all built-in standards, all PDF report levels, and import/export.

DISCLAIMER
The Cycle is an independent tool. Its built-in life-cycle templates are simplified, indicative representations of public engineering standards, provided for guidance only — not the standards themselves, and no substitute for the official documents. Use implies no compliance, certification or endorsement. JohnsonB / The Cycle is not affiliated with CENELEC, IEC, ISO, IEEE, RTCA or any standards body.

What’s new

First production Release