Which of the following is NOT a method for tracking time spent on projects in Xero?

The method involving "Assess projects" is not a recognized way to track time spent on projects in Xero. Xero provides various tools specifically designed for recording and managing time against projects, such as adding time entries directly, copying existing time entries for efficiency, and viewing and editing time to ensure accuracy. These functions allow users to effectively track progress and manage resources based on time logged. "Assess projects," on the other hand, implies an evaluation or analysis of project performance, rather than the direct recording of time spent, which does not align with the tools available in Xero for time tracking.