MODIFICATIONS OF THE SCHEFFE SIMPLEX DESIGN

The paper introduces some modifications of the Scheffe Simplex design in a way to give more information about the characteristics of the sys tem (product) which is composed of all-available components (fractions ). Namely, experiments arc suggested to be conducted over the all-comp onent mixtures only, thus giving more informative data basis for deriv ing a relevant mathematical model. By introducing the pseudo - compone nts the connection with the Scheffe's design was preserved as well as all properties of the original method, while the similarity between Sc heffe's and our experimental ''space'' was used for easy recalculation of the pseudo- into the real- components. Practical application of th e idea was demonstrated on an illustrative example.