Your roster contains information you're entitled to understand. Headcode surfaces it — shift by shift, score by score, for you.
Headcode uses the HSE Fatigue Risk Index — a biomathematical model built on decades of sleep research. Every shift gets three scores combined into a single Fatigue Index.
Night-by-night modelling of how much sleep you’re likely to get, and how that builds into a cognitive performance deficit over consecutive shifts. The dominant factor — consecutive early starts compound heavily.
The human body has a performance nadir between 02:00 and 05:00. A 04:00 start scores significantly higher than a 09:00 start of identical length, even with the same rest gap.
Train driving is classified as safety-critical with continuous attention required. Break durations, PNB times, and maximum continuous driving blocks are factored in — especially in enhanced mode.