We have been working with a UK dairy manufacturer on a two-year project which aims to understand and improve their forecasting and production planning systems. We employed Value Stream Mapping, identifying several issues, including: highly variable forecasts, inappropriate settings within production planning algorithm, and long production cycles. In implementation stage, we first piloted our recommendations on nine products. We were then given supervision of a complete factory with 55 products. We have seen significant improvement including improved fill-rate, reduced number of rush orders, reduction of obsolete stock. We are currently working on implementation for another factory that produces 400 products.