ChronoEngineering 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 performance.
For 51 years, our studies and methodologies have advanced the understanding of human time biology and fatigue. Our chronobiology and mathematical model power enterprise solutions that are designed fundamentally simple and extremely cost effective for the purpose they are to serve in eliminating human factor fatigue.
ChronoEngineering builds scientifically validated software for all 49 – 24/7 shiftwork industries on earth – predictive tools that see fatigue risk materializing BEFORE it ever reaches a shit, a schedule or a site.
Over five decades of chronobioly research applications distilled into extemely simple working software platforms. Each designed to eliminate the vestiges of fatigue.
This is not a new cookie, it’s a revolution! A new discipline engineered around the human condition and operational needs together.
SINCE 1975
Pioneering best practices to save lives
50 YEARS
Spearheading Fatigue and Scheduling Solutions
FATIGUE MODEL
FIRM, One of only 10 Worldwide
VALIDATION RESULTS
Scientifically Validated to be the most precise
GROUND BREAKING
Identifying Invasive Circadian Events
GLOBAL REACH
Ground Breaking Result revolutionizing!
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.
The size of the shiftwork population is best illustrated through identifying the industries where shiftwork is a matter of routine. The following table, developed by ISA, distinguishes 49 distinct types of industries that make up the bulk of shiftwork population. As is evident by the table shiftwork occurs across thee entire economy, reflecting the reality that we are relentlessly evolving into a non-stop society, dependent on a vast shiftwork population to sustain our lifestyle and, indeed, our lives. These industries are classified as continuous operations, services, and processes as follows:
Shiftwork dependent on staffing requirements.
Shiftwork dependent upon the needs of society.
Shiftwork dependent on continuous equipment.
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
Reschedules all US Air Traffic Control Centers (Rapcon, Tracon, Class 4 & 5)
Introduces Activity-Rest Cycles (ARC) models for personal risk prevention
Founds the Chronoengineering Department, Ohio Div. of Safety & Hygiene
Founds the National Association for Shiftwork Health
Builds the first Smart Relief system for balanced circadian phase
Ships first Bid-pack Master Scheduler for US railroads
Copyrights the first viable 4–10 hour schedule for 24/7 fixed-start operations
Delivers ERA — proportional staffing efficiency software for US police
Develops FIRM — Fatigue Intelligent Risk Model (FIRM II, 2019)
Launches LENS — the yearly Lifestyle-Planner for individual shiftworkers
Introduces PRISM — Predictive Risk Intelligent Safety Module
Ships ISOP scheduler and the Smart Relief Task Scheduling System (TSS)
Releases LENS mobile app for shiftworkers
Deploys Smart Relief call-in software system
FIRM 2 Monitoring — captures fatigue risk before it reaches the site
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.
