. () (push system) , . () (pull system), . , ( ) .
. DRP / DRP II (Distribution Requirements / Resource Planning) () , , . - DDT (Demand-Driven Techniques) : QR (Quick Response), CR (Continuous Replenishment) AR (Automatic Replenishment) . . .
DRP II (Distribution Requirements/resource Planning). / . . , .
DRP MRP , - Sales & Operations Planning . . MRP II: -, - ; -, .
ERP (Enterprise resource planning) - - . , , , () . ERP SCM (Supply Chain Management) DRP (Distribution Resource Planning).