Which statement best describes Just-In-Time (JIT) inventory practices?

• A. JIT relies on monthly bulk ordering.
• B. Production runs with long lead times.
• C. Inventory is kept at safety stock for all items.
• D. Inventory is minimized with just-in-time ordering; reduces waste and improves flow.

Answer: (D)

JIT is about having materials arrive exactly when they’re needed in the production process, so you keep as little inventory on hand as possible. This approach reduces carrying costs, minimizes waste from excess stock, and keeps production flowing smoothly by pulling materials through the system in response to actual demand. The statement that best describes this captures both the goal of minimal inventory and the benefits of waste reduction and improved flow.

Bulk monthly ordering, long lead times, and keeping safety stock for all items all run counter to JIT. Bulk orders lock you into large inventories and higher storage costs; long lead times disrupt the pull-based flow JIT relies on; and keeping safety stock everywhere defeats the aim of minimizing inventory in favor of flexibility, which is costly and often unnecessary under JIT. In practice, JIT also depends on reliable suppliers, frequent small deliveries, and tight scheduling to sustain a smooth, just-in-time flow.