How the index works

Product scores come first

Every machine is scored 0–10 from manufacturer documents and owner evidence: Performance 40% (range, power, capacity, weight), Accountability 25% (warranty, returns, published support), Satisfaction 20% (the product's own verified buyer ratings), Value 15% (price against what the specification delivers).

The Brand Index

A company's index is the mean of its three best machines' scores. Depth counts: a maker with one great chair and nine weak ones is a specialist, not a leader, and is listed as a specialist. Companies need at least two scored machines for the main sections.

Independence

No company pays to be listed or ranked here, and no score is adjusted for any company. Order follows the Brand Index only.

Corrections

Manufacturers may submit documentation for any figure; verified corrections are published with a dated note.