🎓 Student Projects (College Reports) · Sequence
Library Management System Sequence Diagram (Issue a Book)
The steps when a member borrows a book: checks, loan record and the copy status update.
Drawing diagram…
What this diagram shows
- Eligibility check with an alt branch for members who cannot borrow
- Shows the database writes
- Matches the class and ER diagrams
Prompt used
Sequence diagram for issuing a book in a library system: the member asks the librarian for a book; the librarian scans the member card; the system checks the member has no overdue loans and is under the borrow limit; if not eligible it shows the reason; otherwise it creates a loan with a due date 14 days away, marks the copy as issued and prints a due-date slip.
Mermaid code
sequenceDiagram
actor M as Member
actor L as Librarian
participant S as Library System
participant DB as Database
M->>L: Request book
L->>S: Scan member card and book copy
S->>DB: Get member loans and fines
DB-->>S: Loans and fines
alt Overdue loans or limit reached
S-->>L: Not eligible, show reason
L-->>M: Explain why the book cannot be issued
else Eligible
S->>DB: Create loan (due in 14 days)
S->>DB: Mark copy as issued
DB-->>S: Saved
S-->>L: Print due-date slip
L-->>M: Hand over book and slip
endRelated templates
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