Six Sigma in the food industry

The food industry is extremely complex. This industry has some features linked by the nature of the raw materials processed and the finished products obtained. Raw materials are mostly biological products, perishable and degradable. Starting from here we can conclude the need for improvements that can be done with Six Sigma.
Six Sigma is a data-driven systematic approach. DMAIC methodology - Define, Measure, Analyze, Improve & Control is used to improve the existing process.
An example of a successful project using Six Sigma in the food industry is "Reducing complaints for butter manufacturing”.
Butter is one of the most important milk products for human consumption, being the animal fat with the highest digestibility. Butter composition is mainly represented by fat (80-82%), water (15.6 to 17.6%), protein, calcium and phosphorus (about 1.2%).