Three inputs, four outcomes
The inputs are simple: the substance's hazard band (derived from its hazard statements), its volatility or dustiness, and the quantity in use. These three intersect in a table and produce one of four control approaches. The method was designed for small workplaces that cannot commission laboratory measurements; its purpose is to stop decisions from stalling.
Its limits
Banding does not replace measurement. Carcinogens, mutagens and respiratory sensitisers, substances with very low limit values, and work in confined spaces all require measurement and specialist judgement. Banding tells you which direction to move in; it does not tell you that you are safe enough.
In Optifora the band is proposed automatically from the hazard statements of the substance in the inventory; the user accepts it or overrides it with a reason, and both are recorded.