1. Business and IT modeling Car Rental example Alar Krist Alar
Business and IT modeling Car Rental example Alar Krist

2. Simplified description of a car rental business
The essence of the car rental business: customers rent cars
We have many offices in many countries
We have many cars
we group cars by car types (small, medium, big)
We assign rental price to each car type
Customer can make bookings for car types (not for concrete cars)
Customer visits an office and rents a free car or customer makes a rental agreement for a car
Customer returns the car to an office
Clerk creates an invoice to customer
Customer pays the invoice by card or by cash

3. Simplified process model (BPMN diagram)

4. More advanced process model with events (BPMN diagram)

5. Use case diagram

6. Attribute level BIM– business decision: what detail information is needed

7. Sub set of a physical data model (UML class diagram)

8. Architecture model – UML general component diagram (sub systems and main data flows)

9. Architecture model – UML detail component diagram (internal components of sub systems and data flows)

10. Architecture model – UML deployment diagram (nodes where to deploy components)

11. Architecture model – UML deployment diagram (nodes and deployed components)

12. Architecture model – UML class diagram 1 Sub systems, its main data entities, main functionalityand data flows