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This month, I would like to share an interesting tool aiming at monitoring formulation performance. We are touching a very critical topic that dictates the competitive game between feed millers. It is about which company will formulate the best feed at the cheapest cost. It requires a lot of intelligence, time and energy to build set of feed formulas and we need to be sure that not only they are performing better than the competition but that we are actually getting better every month. I am sure that you will be interested in the following article. The job of nutritionist changed a lot in the past years. Nutritionist does not prepare formulas anymore. They are responsible for defining the constraints that will enable optimization software to select the cheapest option. The formulation perimeter is the space allowed to the software between 4 distinct sets of constraints; nutritional requirement, non-nutritional requirement, raw material composition and raw material prices. The mission of nutritionist is to adjust this formulation perimeter (by increasing or decreasing the constraints) to optimize the feed performance (FCR, feed cost, growth, mortality, feed intake, etc…). The difficulty of this process lies in the fact that raw material prices are constantly changing, thus, obliging the software to modify the formulas. Therefore, we cannot compare the performance of formulas made with today’s prices with the ones made yesterday. The economical context varies and makes internal benchmarks difficult over time. FORMULATION PERFORMANCE INDEX The tool that we propose is called FPI for Formulation Performance Index. It is used to monitor the improvement of the formulation skills during a period of time. During the year, formulation will change due to: As we are trying to evaluate if the changes of the perimeter done by the formulator are having a positive impact on the