Build the claimant's working history. For each job/role, enter the typical daily A(8) (use the Daily A(8) tab to compute if needed), the years worked in that role, and working days per year (the HSE convention is 240 days = 5 days × 48 weeks).

Cumulative exposure is reported in HSE "exposure points × days" (a linear-additive metric). For interpretation, the calculator also presents this as EAV-equivalent years — the number of full working years (at 240 days/yr) at exactly the EAV (100 points/day) that would deliver the same cumulative exposure. So a claimant with cumulative exposure equal to "5 EAV-equivalent years" has experienced the same total vibration dose as five years' work continuously at the action level.

The calculator also reports years above EAV and years above ELV — flat counts of how many years of the working history involved daily exposures exceeding each statutory threshold. These are the figures most often cited in HAVS causation arguments (cf. Allen v BREL Ltd [2001] ICR 942; thereafter regularly).

Enter the clinical findings from the medical evidence for each hand. This tab records them in the standard modified Stockholm Workshop Scale notation (the current UK standard, HSE L140 / SOM 2022) and produces a clean, citable summary.

It is a recording and interpretation aid — the staging itself is a clinical judgement for the medical expert; this tab reflects the findings you enter. The vascular grade (0v–3v) primarily reflects the extent of blanching, and stage 2v is conventionally split into early and late. The sensorineural grade (0sn–3sn) turns on the distinction between a symptom (numbness) and a sign (examination-confirmed reduced perception). The old 4v is withdrawn from the modified scale.