Current packaging industry standards specify single axis (vertical) vibration for transportation simulation; however transportation vehicles undergo vibration in both lateral and longitudinal axes as well. Although the vertical motion is overall more intense, the lateral and longitudinal motion is often equal in intensity or even higher than that of the vertical motion within particular frequency ranges. This presentation will discuss the use of simultaneous three axis vibration as compared to single axis vibration in the evaluation of individual packaged product response and the stability of a unit load