LOT 894 information
Calculator Methodology
LOT 894 combines established formulas with transparent assumptions and practical browser-based calculation.
Formula and source selection
Methods are chosen for relevance to the named calculator. Authoritative government, university, standards, medical and educational sources are preferred where the subject requires them.
Calculation testing
Tests use representative inputs, boundary values, empty states, invalid combinations and independent manual calculations. Working calculator logic is preserved when shared presentation code is updated.
Rounding and number formatting
Intermediate calculations generally retain precision while displayed results use a practical number of decimals. Currency output should use locale-aware formatting.
Currency and units
The site defaults to USD and SI units unless a calculator states otherwise. MYR and other units may be offered when relevant. Inputs are converted before formulas to avoid mixed-unit calculations.
Dates and time zones
Date tools should use valid calendar dates and state material assumptions. Local-browser dates can differ by time zone, so timeline calculators explain their reference date.
Live and regulatory data
A value is called live only when connected to a real source with an update time. Jurisdiction-specific rules require an effective period, official source and review date.
Review, updates and errors
Pages display a review date after a substantive check. Reports of errors should include reproducible inputs, the observed result and an authoritative supporting source.
Limitations
Simplified formulas cannot model every personal, regulatory or specialist circumstance. Calculator-specific limitations take priority over this general methodology.