The design process is an open field on research for chemical engineering. This project is focus in the description of the steps to make the sequential procedure for chemical process design that allows the selection of an optimum technological alternative having into consideration certain criteria like technical, environmental and economics on a heuristic way. These criteria are easily quantifiable and it permits the designer's decisions. For the identification of these steps we take into account some precedents about process design made by Ulrich and his comparison with some sequential heuristic procedures taking into consideration the plant design during the whole process. Finally, we exemplify through a case study related with the production of an animal food with sub-products from de Sugar Industry. We can conclude that the sequential procedure allows the optimum technological alternative. The technical, economics and environmental criteria can quantify using software like MATLAB and EXCEL.