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CMA Intermediate · Operations Management and Strategic Management · Lean Operations and JIT

Which statement about 'pull' in lean operations is correct?

In a lean pull system, an upstream stage produces only when the downstream stage signals that it needs material, typically through kanban. This ties output to actual demand and keeps inventory low. Forecast-driven release is push, and large buffers or bulk deliveries run against lean principles.

  1. AWork is released to each stage based on a forecast-driven schedule pushed from the first stage
  2. BUpstream stages produce only when the downstream stage signals a need for materialCorrect
  3. CPull systems require large buffer stocks between every pair of workstations
  4. DPull means suppliers deliver in bulk to reduce ordering frequency

Explanation

In a pull system, production at an upstream stage is authorised only by actual consumption signalled downstream, as with kanban. Forecast-driven release is push. Large buffers and bulk deliveries contradict the lean aim of minimising inventory.

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