Scope limits: Must have
Buyers must keep a written contamination map, recovered-fraction target and a named residual-moisture method. Without those three items, two factories cannot be compared on the same sheet. We restate missing fields rather than filling them with brochure defaults. Connected load in kW, supply frequency in Hz and footprint in millimetres belong in the same pack when the bay is already known.
Tradeoff
A narrow washing-only RFQ is easier to compare and may omit optical sorting or water treatment that the plant still needs. A full-line RFQ captures interfaces and staffing but mixes mechanical price with civil and permit work. Industry dispute “single machine or integrated line” is exactly this split: compare interfaces, staffing and acceptance boundaries instead of forcing one envelope.