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EXPERIMENTAL DESIGN
Pages 8-12

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From page 8...
... Such concerns with maximizing information are indicated by continuing concern about sample size: "How big does n need to be? " The methods of experimental design, however, concentrate on the overall goal efficiently obtaining information with direct bearing on the effectiveness of the tested system rather than on a single proxy measure sample size.
From page 9...
... Nontesting considerations, such as training, sometimes impose hidden constraints on test plans. For example, one participant described attempts to reduce sample size requirements in the testing of an already deployed system.
From page 10...
... One potentially applicable area of experimental design is currently attracting substantial research interest: the designed exercise of large computer codes, such as those used in preparing the COLA and the Operational Requirements Document. Various designs for systematically distributing a sample of computer runs over the high-dimensional space of possible model runs could also provide information to those decision makers ultimately responsible for formulating the Operational Requirements Document.
From page 11...
... One relevant criticism of some OT&E programs concerns potential biases resulting from using golden crews that is, operational testers who have higher skill levels than regular users when testing a system's performance. Designing sampling plans to get representative samples, using methods closely related to experimental design, is a practical way to address some of the perceived problems in test design (Fienberg and Tanur, 1987~.
From page 12...
... . In summary, just as earlier statistical quality control methods were eventually adapted to form the basis of the military standard sampling plans, so today's quality movement, with its emphasis on early use of experimental design and related methods to collect information optimally in the pursuit of ultimate quality, has the potential for contributing to current military procurement processes.


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