Library L2
Library
Librarian
Librarian
Request for
loan accepted
Scan member's
ID card
Has paid
member-
ship?
Scan a book
Process canceled
Create a loan
Move book to
the shelf with
reserved books
Is there any
other book remaining?
Finish the loan
If all of reader's books have
been reserved, the loan has
to be canceled. It is handled
in the subprocess.
Book
reserved
Check the desk
Loan finishedRequest a fee
Paid?
Extend
membership
Printed
bill
System
System
Members
Verify
membership
Book need to
be picked up
Reader is notified that he/she
has to pick up the book within 3
days at the latest and that the
book can be found on the shelf
with reserved books.
Membership extended
Reader
Name: Ondřej Dacer
UČO: 465263
Description of process:
There are 2 desks in the library. The first one is for registration of new members (readers) and the second one is for book loans. Consider
a scenario when a member wants to borrow books from the library. He just grabs some books and approaches the desk. The librarian
behind the desk asks for the library ID card and the books. First scans the member’s ID card. If the system says that the member has a
valid membership, the librarian creates a loan, scans the books and finishes the loan. But if the member doesn’t have a valid membership,
the librarian asks him to pay a fee. If the member is willing to extend his membership, he pays the fee, the librarian extends his/her
membership, the system creates an email notification and the process continues the same as above. Otherwise, the process is canceled. If
the reader wants to borrow a book which has been already reserved, the librarian puts the book on the shelf for all reserved books and the
system creates a notification for the member who made the reservation. Unfortunately, the library doesn't have enough staff to pick up
reserved books from the shelves and from time to time these situations occur.
Reader who made the reservation
No
Yes
Requestforloan
No
Emailnotification
No
Yes
Yes
Payment
response
Request for
payment
Emailnotification
Manual task does not pass data,
so gateway cannot decide (it should be user task) -0.5
This parallelism is unnecessary (this event happens immediately) -0.5
Result: 11