The interaction between operator input, machine and operating surface is highly complex and varied. Time based equipment evaluation metrics are limited in the type of information they can convey. A common alternative to time based evaluation is mechanical modeling, however;​ these models can be complex and require an advanced understanding of mechanics to construct. The purpose of this research is to provide the framework for a simple vehicle performance indicator which is capable of providing meaningful insight into the physical interaction between the equipment and its operating environment. The value of this indicator is in its versatility, and simplicity which allows it to be implemented by a wide range of researchers and operators who have an understanding of the basic principles of mechanics.

This document proposes a generalized methodology which uses forces measured from the hubs or struts of mobile haulage equipment to quantify, with magnitude and direction, the effects of the interaction between machine and environment. The method proposed is easily adaptable to allow alternative effects and perspectives to be evaluated.

In addition to the formulation of the Generalized g Level Analysis method a scale model investigation is provided to demonstrate the mechanics of g level based evaluation and provide insight into the adverse motions experienced by full scale underground articulated haul trucks. The g Level Analysis method is also applied to field data collected from an ultra class rigid body haul truck operating in Alberta’s oil sands. This field data is used to present additional applications of the method including haul road monitoring and equipment efficiency.