Use Case is divided into Essential Use Case and System Use Case, also called Traditional User Case or Concrete System. Essential Use Case is merely describing business information, which does not appear in the description of the word System USE CASE Case combined with the system's interactive USE CASE: Applications Essential Use Casebasic Cource of Action: 1. User Wants To Be Member2. User fill out form and submit to Clerk3. Clerk validate form base on 'No.23 Biz Role'4. if form is valid, clerk enrol member info.5. Clerk provides user the member no6. The user case endSystem Use CaseBasic cource of action : 1. User Want to Be Member2. User Fill Out Form and Submit IT Via 'Ui002 New Member Form Screen'3. System Validate Form Base On' No.23 Biz Role'4. System Store Member Info.5. System Display Member NO VIA 'UI004 Register SuccessFully Screen'6. The Use Case End