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Production Control with QRM
To manage and effectively control flow within the QRM structure of cells and HL/MRP, QRM uses POLCA (Paired-cell Overlapping Loops of Cards with Authorization).POLCA is a card-based shop floor control system, designed as the QRM option to Kanban.
POLCA varies from commonly used Kanban systems in the kind of signal it sends to move jobs/material through the shop floor. POLCA comprises of a capacity signal, showing that a cell is ready to work on a new job, whereas Kanban systems depend on inventory signals designed to restock a certain quantity of parts. For this purpose, POLCA works well for low-volume and/or custom products.
