1
PROBLEM DEFINITION
Managing a library efficiently and effectively can be a very tedious task
for a human. Managing the data on members of the library becomes
cumbersome at times. Member files are usually misplaced, lost or placed
in the incorrect drawer/cabinet. There are also problems for the books of
the library. Keeping track of the books when they are rented and brought
back is very problematic. Sometimes the books that are being rented
aren’t really a registered book from the library. Someone could have left
their book by accident in the library. As same as the members, the book
files are misplaced and lost.
2
AIM
To rebuild an existing program for the problem using software
engineering techniques. To accept and store data that can be retrieved in
the future when needed. Data will be kept up to date with the books that
are being borrowed and returned from and to the Library. It also keep
track on members when they take out or bring back books and any
updates on their profile.
3
DATA FLOW DIAGRAM (DFD) – CONTEXT LEVEL
(MEMBER/S DATA)
Person’s data
Person
0
Library
System
Member information
Printer
Member card
Manager report
Library
Manager
DATA FLOW DIAGRAM (DFD) – CONTEXT LEVEL
(BOOK/S DATA)
Book/s
Book/s data
0
Library
System
Place book/s
Manager report
Library
Manager
Shelves
4
DATA FLOW DIAGRAM (DFD) – CONTEXT LEVEL (RENTING
BOOKS)
Book/s to rent
0
Member
Book/s
Library
system
Manager Report
Library
Manager
DATA FLOW DIAGRAM (DFD) – CONTEXT LEVEL
(RETURNING BOOKS & LATE FEES)
Return book/s
0
Member
Charge any late fee
Return book/s
Library
System
Manager report
Library
Manager
Shelves
5
DATA FLOW DIAGRAM (DFD) – LEVEL 1
(MEMBER/S DATA)
Person’s data
0.1
Person
Receive
Person’s
Data
Person’s data
0.3
0.2
Member’s card
Transform
person’s data
to member card
format
Member card data
Generate
library
member
increment
Adding Member data
Member card data
D1 Members File
Printer
Members data
0.4
Library
Manager
Manager report
Generate
Manager
Report
6
DATA FLOW DIAGRAM (DFD) – LEVEL 1
(BOOK/S DATA)
Book/s data
0.1
Book/s
Receive
Book/s
data
Book/s data
0.2
Transform
data into
book data
format
0.3
Book data
Generate
library book
increment
Adding books data
D1
Books File
Books data
0.4
Library
Manager
Manager report
Generate
manager
report
7
DATA FLOW DIAGRAM (DFD) – LEVEL 1 (RENTING BOOKS)
Book/s renting
0.1
Member
Receive
book/s
renting data
Book rent data
0.2
Book/s rent data
D1 Book/s rent file
Set date due
for book/s
Book/s data
0.3
D2 Books File
Library books data
Generate
library books
decrements
Daily Library books rented
0.4
Generate
manager
report
Manager report
Library
manager
8
DATA FLOW DIAGRAM (DFD) – LEVEL 1
(RETURNING BOOKS & LATE FEES)
Return book/s
Member
0.1
Receive
book/s
data
0.6
Book/s data
Books data
D2 Books file
Generate
manager
report
0.2
Check if
date due
late
No
books added data
Manager report
Yes
0.4
0.3
Calculate
late fees
Books data
Generate
library
books
increment
Late fees
D1 Late fees file
Late fees
0.5
Generate
late fee
report
Library
manager
late fees report
9
ENTITY RELATION DIAGRAM (ERD)
Name
M
Person
/s
Becomes
Phone
number
M
Name
Member
ID
Member
/s
M
M
Makes
Book/s
Type
Name
Address
1
Phone
number
Date
due
1 Library
Belong
Book
/s
Book/s
Return
M
Date
due
M
Any
late
fees
Book
Rental
Belong
M
Book/s
name
M
M
Type
Book/s
Contains
Name
Book
ID
10
FUNCTIONAL AND NON-FUNCTIONAL REQUIREMENTS
FUNCTIONAL REQUIREMENTS:
This system will store and replace old data on books that come in and out of
the library and members that join the library, rent and return books.
This system will be able to calculate the late fees.
NON-FUNCTIONAL REQUIREMENTS:
This system will be more efficient from its last program.
This system can run on any operating system.