We offer test designs for many purposes:

• measuring the effects of variables
• optimization of products and processes
• product screening
• formulation of mixtures (blends)
• quality assessment
• determination of optimum conditions
• process capability

Types of effects measured:

• 1^st Order- Linear
• 2^nd Order – Quadratic
• 3^rd Order – Cubic
• 4^th Order – Quartic
• Interactions

DOES has developed tests designs which are of a higher order than those found in available software and literature.

Specifically, we ‘have developed 3^rd and 4^th order test designs whereas the available literature and software have only 1^st and 2^nd order test designs. Higher order test designs allow the experimenter to develop higher order models that reduce the lack-of-fit. Thus using higher order models generally improves the ability to predict.

NASA is currently using DOES higher order test designs and models to test the orbital shuttle.

In many cases the use of higher order test designs does not materially increase the sample size.

DOES has also developed proprietary statistical software to analyze test data gathered from experiment test designs. We provide a service of analyzing client's test data.

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