Calculator methodology
Every MIHSAB calculator begins with a clear question, a recognised relationship and the minimum inputs needed for a reviewable estimate.
Formula selection
We identify the standard formula, units, period and assumptions. Financial, health and regulated outputs are labelled as preliminary estimates and do not replace an official or professional decision.
Validation and testing
We test defaults and boundaries such as zero, unusually high rates and invalid dates. The interface blocks clearly invalid inputs and asks users to correct them before relying on a result.
Precision and rounding
Calculations retain full numeric precision internally. Currency and operational outputs are rounded for readable display, while sensitive ratios may show additional decimal places. Rounding the screen does not change the underlying formula.
Examples and comparison
Each guide explains how to test a practical case. The comparison panel helps users understand sensitivity because a single result cannot show the effect of changing price, duration or rate.
Privacy and updates
Calculator values stay in the browser and are not sent to analytics. We add authoritative sources when a result depends on a changing law, rate or standard, and update pages when substantive review occurs.