Since 2010, FPInnovations has been investigating methods, technology, and procedures for harvesting steep terrain safely and efficiently. In 2011, FPInnovations developed a test procedure for evaluating the stability of harvesting equipment on steep slopes (Boswell & Parker, 2011). This procedure was field-tested in 2013 using two feller-bunchers (tilting and non-tilting cabs) (Boswell & Parker, 2015). A result of this research included the development of a computer model for assessing the stability of feller-bunchers on steep slopes (Parker, 2015). Recently, FPInnovations launched the Steep Slope Initiative (SSI, 2016) and has facilitated discussions with manufacturers and industry on this topic. Manufacturers are very interested in providing solutions to allow users to safely operate on steep slopes. Deere & Company (John Deere) expressed an interest in developing appropriate testing standards for assessing physical machine characteristics (e.g., centre of gravity [CG] position) and agreed to co-operate with FPInnovations in this endeavour. FPInnovations and John Deere developed and carried out a plan to evaluate machine CG in Dubuque, Iowa, in early 2016.