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Operational Simulation · 52 weeks across a multi-echelon network

Same demand and the same supplier outage on both sides — only the inventory strategy changes

LEAN / JIT
Near-zero buffers · 1 week safety stock · cheapest in calm weather
Wk 1
BALANCED + SAFETY STOCK
2 weeks safety stock · multi-sourcing · resilient to shocks
Wk 1
Supplier Plant Distribution Centre Region served Region in stockout
Goods in transit DC inventory (safety-stock band shaded) Disrupted supplier (link cut) 52 weeks compressed into ~36 s at default speed · A primary-supplier outage strikes around week 21 and lasts ~6 weeks (identical on both sides) · Lean runs near-empty so it starves immediately; Balanced draws down safety stock and keeps serving · Fill rate = share of demanded units delivered · Lost sales valued at €50/unit (same convention as the Monte Carlo report) · Fixed seed: identical result on every reset · A single illustrative year, not the 14,400-run Monte Carlo distribution