Chrono Engineering has developed over more than 50 years fatigue mitigation, and chronobiology research applications, into enterprise software that helps organizations eliminate fatigue improve workforce safety, and optimize operational performancev
For more than five decades, our scientists and engineers have advanced the understanding of human time biology and fatigue. Our chronobiology and biomathematical models power
enterprise solutions that deliver measurable value in the world’s most demanding 24/7 environments.
ChronoEngineering builds scientifically validated software for the largest 24/7 operations on earth — predictive tools that see fatigue risk forming before it ever reaches a shift, a schedule, or a site.
Over five decades of chronobiological research, distilled into a working platform. This is not a new cookie. It is a new discipline — engineered around the human day, evening and night.
Since 1975
Pioneering shiftwork chronobiology
51 years
Spearheading fatigue & scheduling solutions
US Government partner
National Association for Shiftwork Health
Global reach
Deployed across rail, aviation, energy, safety & defense
01
Continuous fatigue-risk surveillance
02
Fitness-for-Duty call-in intelligence
03
Lifestyle Education & Notifications
04
Roster fatigue-risk assessment
Each module operates independently and compounds when deployed together — from long-term monitoring to the moment a phone rings at 3 a.m.
01
Fatigue Intelligent Risk Model — 24/7
Captures fatigue risk before it reaches the site. FIRM 2 Monitoring outperforms other fatigue models — compatible with and superseding regulations and industry best practices.
02
The ultimate risk-free call-in service
Uses biomathematical modeling to select the right person for the right job — ensuring they are the most optimally alert to perform the job safely.
03
Lifestyle Education & Notifications for
Shiftworkers
A mobile companion that translates each unique schedule into personal best practices — when to sleep, what to eat, when caffeine helps, when fatigue peaks.
Fatigue Intelligent Risk Model — 24/7
Captures fatigue risk before it reaches the site. FIRM 2 Monitoring continuously evaluates every crew, every shift, and every downstream schedule — compatible with and superseding existing regulations and industry best practices.
The moment absentee coverage becomes safety
Personalized · schedule-aware · daily
No one else does this. LENS turns a shift schedule into a detailed set of activities for on- and off-hours — designed to prepare each worker for optimum performance on their exact rotation.
Fatigue Intelligent Risk Model — 24/7
Assess the risk of the roster you have today, then chart the precise lifestyle strategies and countermeasures that lower it — an educational bridge into biomathematical scheduling.
Our technology is built on rigeroua scientific research and verified in real-world operational environments across the globe.
ChronoEngineering was built by equal founders — the inventor of the FIRM model and the architect who turned it into working software for the world’s 24/7 operations.
Founder · Managing Partner
Civil, Industrial and Mechanical Engineer with a Master of Organizational Behavior. Sole original owner, founder and inventor of FIRM and the FIRM Fatigue Scale; co-developer of FIRM 2 Monitoring with Dr. Dave Johannsen. Over five decades — 51 years — spearheading fatigue and scheduling solutions for hundreds of Fortune 500 companies. Founder of the National Association for Shiftwork Health.
Co-Founder · Chief Architect
Chief architect and managing partner of ChronoEngineering — the entire architect of ChronoEngineering. BS Electrical Engineering; MS Computer Science, Caltech 1978; PhD Computer Science, Caltech 1981 (doctoral thesis: Silicon Compilation). Lead designer of FIRM & FIRM 2 Monitoring, PRISM, LENS, LENSmobile, Smart Relief, Visual AIM, ISOP and TSS. Architect of the PASS (Predictive Analytic Scheduling Solutions) engine.
1975 — 2024
Copyrights 88 unique scheduling systems for 24/7 processes
Introduces Activity-Rest Cycles (ARC) models for personal risk prevention
Founds the National Association for Shiftwork Health
Ships first Bid-pack Master Scheduler for US railroads
Delivers ERA — proportional staffing efficiency software for US police
Launches LENS — the yearly Lifestyle-Planner for individual shiftworkers
Ships ISOP scheduler and the Smart Relief Task Scheduling System (TSS)
Deploys Smart Relief call-in software system
Reschedules all US Air Traffic Control Centers (Rapcon, Tracon, Class 4 & 5)
Founds the Chronoengineering Department, Ohio Div. of Safety & Hygiene
Builds the first Smart Relief system for balanced circadian phase
Copyrights the first viable 4–10 hour schedule for 24/7 fixed-start operations
Develops FIRM — Fatigue Intelligent Risk Model (FIRM II, 2019)
Introduces PRISM — Predictive Risk Intelligent Safety Module
Releases LENS mobile app for shiftworkers
FIRM 2 Monitoring — captures fatigue risk before it reaches the site
A growing archive of demonstrations, peer-reviewed research and operational case studies from the field.
Video
Coming soon · YouTube
Video
Coming soon · YouTube
Research
Scientific report · PDF
Research
Scientific report · PDF
Not seeing your question? Reach the team directly — we prefer real conversations to canned answers.
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A short conversation is the fastest way to see whether ChronoEngineering fits your operation.
