Yes. An easy way to shorten the time entry process and reduce errors is to implement Project Assignments. This feature limits what employees, activities and expenses are assigned to projects, resulting in shorter drop-downs and lists and less chances of errors. This feature is applicable to time and expense entries only. If you want to extend this to other modules, a better feature is Employee Control. It limits what projects, activities and expenses are assigned to employees, So employees access what is relevant to them throughout Core.