S. W. ROBERTS Bell Telephone Laboratories A geometrical moving average gives the most recent observation the greatest weight, and all previous observations weights decreasing in geometric progression from the most recent back to the first. A graphical procedure for generating geometric moving Read more
LOUIS B. KAHN Shell Development Company Emeryville, California This paper outlines a technique for determining the probability of failure of a plant manufacturing a hazardous product. For the failure of the plant to occur, the failure of the safety system must precede the failure of the plant’s Read more
A. W. UMLAND AND W. N. SMITH Chemical Engineering Department Dow Chemical Company Freeport, Texas Using LaGrange multipliers an example is given wherein the optimum level of a fitted second order response function is obtained subject to a constraint provided by another fitted second order Read more
MARVIN ZELEN National Bureau of Standards Washington, D. C. This paper discusses procedures for analyzing factorial experiments, where the experiment deals with the life testing of components or equipment. These procedures assume an underlying general distribution of “times-to-failure”, of Read more
JOHN MANDEL National Bureau of Standards Washington, D. C. This paper deals with the theory of a proposed method for the statistical study of measuring processes. The practical aspects of the method, including computational details, are discussed in a companion paper published in the ASTM Read more