a) How is use case diagram related to functional modeling?
b) How does an essential use case differ from a real use case?
c) What is the purpose of activity diagram?
d) What is the purpose of a fork node?
Draw a use case diagram and set of activity diagrams for the process of buying glasses from a viewpoint of the patient. The first step is to see an eye doctor who will give you a prescription. Once you have a prescription, you go to an optical dispensary, where you select your frames and place the order for your glasses. Once the glasses have been made, you return to the store for a fitting and pay for the glasses
Create a detailed (expanded) use-case description for one of the main use case in 2.