In the DOE Guide, on pg 429, under Evaluate Design > Evaluating Relative to a Specified Model, it describes evaluating the "power of detecting an effect whose magnitude is three times the error" by setting the Anticipated Coefficient to 3 and the Anticipated RMSE to 1. This sounds like a signal-to-noise ratio (SNR) of 3.
Later in the DOE Guide, on pg 451, under Evaluate Design Options > Advanced Options > Set Delta for Power, it states to, "Specify a value for the difference you want to detect that is applied to Anticipated Coefficients in the Power Analysis report. The Anticipated Coefficient values are set to Delta/2...." From this it seems that the default Delta=2, is a SNR of 2:1, but in this case the Anticipated Coefficient values of 1 and Anticipated RMSE of 1, which differs from the first option by a factor of 2.
When "Set Delta For Power" is set to 2, does this represent a SNR of 2 or 1?