✅ Correct Answer: Demand forecast errors, order batching, and price fluctuation incentives cause each upstream tier to over-order relative to actual demand
📌 Explanation
The bullwhip effect occurs because each upstream tier buffers its uncertainty by over-ordering, driven by demand forecast errors, order batching, price fluctuations, and rationing/shortage gaming — amplifying variability as it moves upstream.
❌ Why the other options are wrong:
Retailers are placing fraudulent orders to obtain early delivery of goods — Describes fraud, not a structural supply-chain phenomenon.
Raw material suppliers are deliberately inflating production costs to justify higher prices — Describes pricing behaviour, not demand amplification.
The SCOR model does not account for multi-tier supply networks and therefore underestimates demand — SCOR is unrelated to the cause of the bullwhip effect.
🧠 Summary
Bullwhip is caused by each tier buffering uncertainty without sharing real demand data — not by fraud, supplier behaviour, or modelling gaps.
📋 LO: 1.0 — Understand the dynamics of supply chains
📐 AC: 1.1 — Compare supply chains, supply network and supply chain management
📑 Indicative content: 1.1.1 — Defining supply chains, supply networks and supply chain management (bullwhip effect as a property of multi-tier supply chains)