PRINCEPS is a consulting and refinery software provider company, with a special focus on production planning and scheduling. Strong with more than 15 years field experience through planning and scheduling projects worldwide, we have developed an innovative software suite which introduces a new paradigm in this domain. Most importantly, PRINCEPS has developed over the years, a strong working partnership with its clients, which is at the foundation of its customer oriented culture. In addition to a core smart simulation module named flowers, PRINCEPS has developped 2 optimisation modules with very unique features. Its crude oil optimized scheduling Compass is the only available solution in the market capable of handling real size crude Blending and sequencing optimization problems under tight operational and logistical constraints. At the downstream end, Optimix ensures efficient multiple blends optimization while taking into account virtually any specific situation or constraint.