The resonant response analyses result in peak accelerations and velocities, which are often not used in evaluation of vibration performance criteria because they are not representative of the vibration as a whole. A measure of the average response amplitude is the root mean square, or RMS values which are generally evaluated over a certain time period. The RMS method involves squaring the velocity or acceleration at each time instant, finding the average of the squared values over the evaluation period, then taking the square root of this average. For simple harmonic motion the RMS value is equal to $1/\sqrt{2}$ or 70.7% of the peak value. In the calculation of RMS values in RAM Concept , the RMS value is always taken as $1/\sqrt{2}$ of the peak value.