Is price-quantity discount dead in a just-in-time environment?

Companies have traditionally relied on taking advantage of price-quantity discount (PQD) on large purchases. With the adoption of just-in-time (JIT) philosophy companies are encouraged to purchase materials in small lots to synchronize production with deliveries. This raised a question whether PDQ is applicable in a JIT purchasing environment. Argues that though seemingly inconsistent, JIT and PQD can coexist. Develops an integrated JIT-PQD model to allow a buyer to decide how much to purchase and how many shipments be placed per order.