A Proactive Approach to Aggregate Quality Control: Oversize/Undersize

In continuing our efforts to innovate the aggregate quality control process, LASTRADA Partners set out to find an improved, proactive approach to aggregate QC. We repurposed the European oversize/undersize specification into a quality control method that directly identifies problems in reduction, screening wear, and carry over.

In this video, we use customer data to demonstrate an alternate technique for managing production efficiency. We found a change in reduction ratio through our oversize/undersize method which could not be seen when using common QC techniques. Tracking a product’s oversize gives us a direct measure of screen wear on a screen deck, while tracking undersize measures screening efficiency of the same deck. Looking at the oversize of all products together measures reduction ratio changes. Our approach is aimed to directly monitoring the consistency of screen decks while performing typical quality control, providing early indications of production changes before the aggregate products fall out of specification.