The expressions above read these as $const. They are the figures the annual refresh replaces, so they live as data rather than being written into the formulas — which is what makes a year-on-year change a one-line diff instead of an edit to arithmetic.
Constant
Value
qualifyingMonths
12
annualLeaveDays
14
Test vectors (5)
Every case is executed against this model on each build, by the Java engine and independently by a JavaScript one. A mismatch of a single cent fails the build, so the page cannot ship advertising a figure the model no longer produces.
Case 1 — L1 twelve months of continuous service: 14 days
given serviceMonths
12
given daysTaken
0
expect daysEntitled
14
Case 2 — L2 eleven months: no statutory annual leave yet
given serviceMonths
11
given daysTaken
0
expect daysEntitled
0
Case 3 — L3 ten years: still 14 — the statute has no service bands
The whole model as JSON — inputs, outputs, formulas, vectors and sources in one re-runnable document.
This model is published under CC BY 4.0: use it, adapt it, build on it, with attribution. The licence covers the model — the expression of each rule and the arrangement of the catalog. The rates and thresholds are law, and nobody licenses those; the sources above are where they come from.