An Order of Magnitude Study (OoM) is a front-end study typically used to support the decision to progress to Preliminary Economic Assessment (PEA) and to guide corporate decision making. Order of Magnitude (±50%) estimating accuracy is typical for this level of study. These studies are cost effective, not requiring QP site visits, but are not suitable for public disclosure. Many of our clients have found great value in performing an OoM study prior to more detailed studies as it can help identify key trade-off studies and areas of high economic sensitivity to focus on going forward.