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ARTICLE · 13 AUGUST 2026

You’ve Invested In SIOP. Why Isn’t It Working?

Manufacturing companies investing heavily in forecasting and planning systems still struggle with disappointing fill rates and missed inventory targets, often turning monthly SIOP review meetings into firefighting sessions...

United KingdomStrategy

Most manufacturers running SIOP use tools designed to help them manage supply chain volatility. Despite heavy investments in forecasting and planning systems, companies find that their fill rates disappoint and inventory targets are missed. Monthly review meetings result in more firefighting than decision-making. Rather than blaming the tools and platforms, the fault often lies in the lack of a strong process architecture that connects them.  

As we explored in Navigating Supply Chain and Tariff Turbulence, building the data foundation is the required first step. It consists of clean demand data, accurate bills of material, clear supply signals, and an integrated ERP. But no matter how well the data is managed, it’s the process architecture that puts it all to work effectively.  

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