43 (112)

340 Solutions to Exercises

There are also disadvantages. In the reąuirements phase the users could make a significant contribution, while they are less useful in the specification of the technical architecture. Therefore it is natural to split the phases here. Another disadvantage is the violation of the “principal of separation of concerns,” which says that it is better to concentrate on one aspect at a time, i.e., functional and technical details should be con-sidered in separate phases.

SOLUTIONS TO EXERCISES, CHAPTER 7

Exercise 7.1

We provide the solution only to the ąuestion 7.1(b). Figurę S7.1 shows the process model of the current situation. We did not model resource triggers: most of the tasks reąuire a resource trigger.

Tasks

1.    Register private client

2.    Register business client

3.    Check permit

4.    Give blank permit

5.    Return improper permit

6.    Receive filled permit

7.    File proper permit

8.    Check proper permit

9.    Start business trip

10.    Send copy to fd

11.    Start private trip

12.    Check allowed

13.    Prepare proposal

14.    Prepare new proposal

15.    Cali client for approval

16.    Send positive memo

17.    Check approved proposal

18.    Check private trip

19.    Determine costs of flights

20.    Cali client

21.    Send negative memo