One way to determine if the instruction that has been created is effective is to run a pilot or test class. Ideally, the pilot class will be with a group of students or others acting as students. This is a chance for the instructional designer to assess if the learning is effective and if there are any issues that become apparent that need to be addressed before the training goes "live."
If the course is online training, the pilot class can illustrate any technical issues as well as content issues.
During the pilot class, useful information for the instructional designer to collect includes: