Don't really catch your drift.
Just shoot the piece straight, then adjust the fence to required width, then shoot piece down until plane stops cutting, hey presto, exact width, repeatable, to within a few thou.
For example, today I've just planed some Q/S spruce back and front braces: 5mm thick, 10mm wide. Started out with something like 10mm x 20mm standard bought in stuff, then just planed it down to exact size, a lot easier than handsawing .And didn't take very long.
(I don't have a bandsaw, and live in a retirement complex, so can't make too much noise. Years ago I did have a proper workshop with machinery -planer/thicknesser, table saw, bandsaw etc. So, it's all hand tools now, apart from a Proxxon disc sander and a wet and dry grinder for tool sharpening.)