While the Uniform Standards of Professional Appraisal Practice (USPAP) has always required appraisers to identify the scope of work needed to produce credible results, it became clear in recent years that appraisers did not fully understand the process for developing this adequately. In formulating the scope of work for a credible appraisal, the concept of a "limited" versus "complete" appraisal and the use of the Departure Rule caused confusion to clients, appraisers, and appraisal reviewers. To deal with this, USPAP was updated in 2006 with what came to be known as the Scope of Work Project. Following this, USPAP eliminated both the Departure Rule and the concept of a limited appraisal, and a new Scope of Work rule was created. In this, appraisers were to identify six key parts of the appraisal problem at the beginning of each assignment: