ENBIS-12 in Ljubljana

9 – 13 September 2012 Abstract submission: 15 January – 10 May 2012

The Design For Variation (DFV) Process at Pratt & Whitney

11 September 2012, 15:00 – 16:00


Submitted by
Grant Reinman
Grant Reinman (Pratt & Whitney)
Design For Variation, a Strategic Initiative at Pratt & Whitney, represents a large scale change in engineering design and analysis processes. Deterministic model predictions with design margins or factors of safety are replaced with probabilistic models that account for all significant sources of variability and uncertainty in the model predictions. These models account for variability in observable model inputs as well as uncertainty in model outputs as predictions of reality. The new "DFV-enabled" processes enable engineers to actively manage variability, uncertainty, and risk directly via design, materials, and process changes. This presentation will describe the strategy and processes used in this ongoing transformation. It includes the elements of a probabilistic engineering modeling process and the steps required for its execution. The benefits in reliability improvement, cost reduction, improved time on wing, and leaner design processes will be discussed. The enablers of this transformation, ranging from methods and software to high intensity computing support to communication and education programs, will be presented.

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