Some New Ideas in the Analysis of Screening Designs.

Consideration of certain aspects of scientific method leads to discussion of recent research on the role of screening designs in the improvement cf quality. A projective rationale for the use of these designs tn the circumstances of fictor sparsily is advanced. In this circumstance the possibility of identification of sparse dispersion effects as well as sparse location effect is considered. A new method for the analysis of firactional factorial designs is advanced.