作者：
Behram J. HansotiaA vice president at Kestnbaum & Company
a management consulting firm specializing in database marketing. Behram has a Masters’ degree in systems engineering and a PhD in management science from the University of Illinois at Urbana-Champaign
This article develops formulas for panel size for designed experiments. Using a simple three‐attribute problem, the author discusses situations for determining panel sizes in the context of the multiple regression an...
This article develops formulas for panel size for designed experiments. Using a simple three‐attribute problem, the author discusses situations for determining panel sizes in the context of the multiple regression and logistic regression formulations. Modeling member net present value and response rate as functions of the attributes of an acquisition program are the two situations considered. The article also has a pedagogical flavor and discusses how the maximum likelihood approach is used in estimating the variance of the partial logistic regression coefficients. Illustrative examples are provided to show the application of the formulas. For marketers, the bottom line result is useful: testing with designed experiments requires far fewer observations than classical tests of hypotheses, where pairwise comparisons are carried out. This is because all the information is used simultaneously to estimate model coefficients. For a non‐technical overview, see the end of the article.
作者：
Abbott, Jack W.Baham, Gary J.Head of the Systems Engineering Section
Naval Ship Engineering Center. He received his Bachelor of Science degree in Mechanical Engineering from Stanford University in 1960 and was then commissioned in the U.S. Navy serving as Engineering Officer in the USS Braine (DD-630). Upon completion of his active duty assignments he entered industry as a Development Engineer and became involved with marine application of gas turbine and fluid power systems. In 1966 he assumed full responsibility for the installation design and equipment acceptance tests of the gas turbine generator/waste-heat boiler system for the DDH-280 Class Destroyer including all associated controls ducting and silencing equipment. In 1970 he became Manager of the DD-963 Auxiliary Power “Trade-Off” Study which resulted in significant modification to the electric steam and compressed air systems. A registered Professional Mechanical Engineer in the State of California and the holder of several patents he is presently enrolled in the Masters Program at George Washington University in Engineering Administration. He is a member of ASNE and SNAME and currently holds the rank of Lieutenant Commander in the U.S. Naval Reserve. Head of the Mechanical Systems Department
Washington D. C. Office of George G. Sharp Inc. He received his BS degree in Engineering from the University of California at Los Angeles. His career started in the design and development of turbomachinery for commercial and marine applications with the Douglas Aircraft Co. He subsequently was employed by the Southern California Edison Co. and later the Turbo-Power and Marine Department of Pratt & Whitney Aircraft in development of power systems for marine and electrical generation applications. At Litton Ship Systems Inc. he participated in development of propulsion power train machinery for the DD-963 and LHA ship programs. He is a member of SNAME a registered Professional Mechanical Engineer in the State of California and is currently completing requirements for a Masters
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