Your university wants to automate the task of checking that students who are scheduled to graduate have actually satisfied the degree requirements in their respective majors. A key challenge in automating this task is that every degree major has its own unique requirements. Study the degree requirements of three disciplines at your university; identify which graduation requirements they have in common and where they diverge.

Describe how the variability might be generaliized so that checking the degree requirements of each major can be derived from the same product line.