Running out of stock on top-selling direct-to-consumer (D2C) catalog SKUs causes two severe compounding losses: immediate missed revenue and a sharp algorithmic drop in organic search ranking and Buy Box share that takes weeks to recover.

The Critical Lead-Time Equation

A stockout occurs whenever a SKU's Days of Supply drops below the vendor's Supplier Replenishment Lead Time without an open Purchase Order (PO) already confirmed in transit.

Days of Supply = Sellable Warehouse Stock / 7-Day Average Daily Sales Velocity
Stockout Risk Trigger: Days of Supply ≤ Supplier Lead Time Days (No Active PO)

Three Watchdog Signals for Inventory Health

Rule & Exception Operational Condition Recommended Action
STOCKOUT_RUNWAY_EXHAUSTION_CRITICAL Days of supply ≤ Lead time with 0 active POs Issue emergency expedited PO for 30–60 days supply.
PHANTOM_IN_TRANSIT_PO_OVERDUE_CRITICAL Inbound PO delivery date passed with 0 GRN scan Follow up with freight forwarder on delayed shipment.
CHANNEL_BUFFER_ALLOCATION_IMBALANCE >70% stock locked in secondary channel reserve Re-balance channel safety buffer back to direct store.

Interactive Pre-Stockout Lost Profit Calculator

Estimate the potential lost profit exposure during an upcoming stockout window:

Days of Supply Remaining: 4.0 Days
Stockout Gap Deficit: 10 Days of Zero Sales
Estimated Lost Net Profit: ₹1,92,150 (350 Unsold Units)

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