Level 3+ is shown when impairment related to fatigue is first suspected, and acts like an early warning.
When performing your own numerical analysis, we recommend treating a level 3+ as a numerical value of 3.8. This is indicative of its interpretation of suspected impairment, and will ensure your calculations are in-line with Fatigue Manager Reports.
Why do you reccomend 3.8 and not 3.75 for example?