This scenario represents inaccurate demand estimation . Subway introduced and promoted a breakfast sandwich, but actual consumer demand exceeded the quantity anticipated when ingredient requirements were planned. The resulting egg shortage is therefore primarily a forecasting and demand-planning failure rather than a transportation delay or infrastructure problem.

Demand estimation converts expected customer purchases into requirements for ingredients, inventory, replenishment, labor, and production capacity. Promotional activity is especially important because promotions can create demand substantially above historical baseline levels. If the promotional uplift is underestimated, a supply chain can experience stockouts even when suppliers and distribution processes operate normally.

A stronger planning process would incorporate promotional forecasts, historical responses to comparable product introductions, store-level sales signals, safety stock for uncertain ingredients, and rapid replenishment mechanisms. As actual sales data becomes available, forecasts should be revised quickly so inventory can be repositioned.

The ACSCP curriculum specifically emphasizes demand planning, inventory management, forecasting, replenishment, and the interrelationships between supply-chain processes.

Therefore, the egg stockout is best classified as inaccurate demand estimation .

Reference Topic: Inventory, Forecasting and Demand Planning — Demand Estimation, Promotional Forecasting, and Stockout Prevention.

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