The stairs in designing use cases are:
Identify the users of the machine
Creating a user profile for every class of users. This includes all roles that the users may also play and relevant to the machine.
Pick out important dreams related to each position. Also, identifying the large roles.
Growing use instances for each aim associated for a use case template. This additionally consists of retaining the equal abstraction stage for the complete use case. Better stage use case steps are considered as dreams for the lower degree.
Structuring the use instances
Reviewing and validating the customers