Forecasting the medicine demand is a cross functional job. Some medicines are in a development phase, others in clinical test and others are waiting for official approval or insurance contract agreement or market share expectations did change. It’s important to understand the assumptions and the impact these have on the forecast of the active pharmaceutical ingredients and the package form. Production lead times are often very long and out of stock situations are having a huge impact on patients depending on the medicines. This requires a better understanding and buildup of the forecast elements and the evolution in time. To keep overview of the historical forecast assumption changes, the forecast evolution, it is required to keep track of the assumptions via a structured way. EyeOn created a database and easy input method that allows for keeping track of all forecast assumption changes. This in the end supports the Sales and Operations planning process, it makes data collection much easier, faster, more efficient and more robust. A big step forward in the forecast process for Amgen Canada.