What are the consequences of unstable demand and interrupted flows on a supply chain managed with a lean philosophy?

What will be an ideal response?

Answer: Lean requires that demand be relatively stable and that flows be relatively smooth. If demand rates are unstable and high, then a downstream station might exhaust all of the inventory in their system and be starved for inventory if upstream stations cannot respond quickly enough. If flow is interrupted due to an unforeseen emergency, quality issues, etc., the downstream work station may grind to a halt while issues are worked out at the point of difficulty.