1. Geometry first
We start with the simplest measurable geometry: area, volume, slope, perimeter, or spacing. Unit conversions are applied before materials-specific assumptions.
2. Assumptions stay editable
Coverage rates, waste, density, package coverage, board width, spacing, and similar factors can vary by project. When they materially affect a result, the user should be able to change them.
3. Purchase units are rounded separately
A geometric requirement and a shopping quantity are different numbers. Boxes, bags, bundles, and whole posts are rounded only after the raw requirement is calculated.
4. Pages need a human review gate
Programmatic publishing is useful for scale, but a page should not be indexed just because a template can generate it. Each page must add a real calculation, example, explanation, or decision aid.
5. Safety boundary
RenoMetric does not choose structural dimensions, code limits, engineering factors, or legally required specifications. Those must come from the project design, local requirements, product documentation, supplier, or qualified professional.