A certificate records that a system was audited. It does not, on its own, make a kernel consistent. What makes a kernel consistent is moisture control at intake, calibrated equipment, disciplined grading against written tolerances, and a habit of recording what happened to every lot.
Our plant was specified with that order of priorities. Raw nut intake is coded and recorded. Conditioning holds moisture inside a target range so shelling performance stays predictable. Grading is carried out against written size, colour and defect tolerances rather than by eye alone. Finished lots carry the code they were given at intake through to the container.
Certification then verifies that system to a recognised standard, which is what a retail or manufacturing buyer needs before a listing. Both parts matter, and they happen in that order.