19. Which factor differentiates the Just-in-time inventory (pull system) from the material requirement planning (push system)?
Answer: D
Movement of materials based on actual needs.
Just-in-time inventory utilizes a pull system that focuses on producing or receiving goods only as they are needed in the production process, which is characterized by the movement of materials based on actual needs. This contrasts with the push system, where inventory is based on forecasts and schedules.
A) Movement of material through a preplanned schedule.
This option describes a characteristic of a push system, where materials are scheduled and moved according to a predetermined plan. In contrast, the pull system does not rely on such schedules, making this option incorrect.
B) Movement of materials through predictive demand planning.
This option suggests that materials are moved based on forecasts and predictions of demand, which aligns with the push system. The pull system, however, operates based on actual demand rather than predictions, rendering this option incorrect.
C) Movement of materials through traditional purchasing methods.
Traditional purchasing methods often align with a push system where inventory is purchased based on forecasts. In a pull system like just-in-time inventory, purchasing is reactive rather than traditional, making this option incorrect.
D) Movement of materials based on actual needs.
This option accurately reflects the essence of the just-in-time inventory system. It emphasizes that materials are supplied based on real-time demand rather than forecasts or schedules, which is the core differentiation from the push system.
Conclusion
The correct answer, "Movement of materials based on actual needs," highlights the fundamental principle of the just-in-time inventory system, which is to align production and inventory with actual consumption. All other options describe characteristics of the push system, which is built around forecasts and schedules, thus failing to capture the essence of the pull system.