1. Process Diagram for Sally’s Bookstore (as written)
Operate the bookstore
Sell Books
Order Books
Print Suggested Orders
Manage Customer Information
Process Sales Transactions
Review Qty on Hand

2. ERD for Sally’s Bookstore (as written)
Is interested in
Category
Is in
Makes/Is for
Is for
Customer
Book
Transaction
Business Rules (Assumptions)
Customers could buy more than one book in a transaction
Books are supplied by only one supplier
Books are in only one category but a customer could like more than one category
Comes from
Supplier
Abbreviated Dictionary:
Customer: Cust-ID, Name, etc.
Transaction: Cust-ID, Book-ID, Date, Qty
Book: Book-ID, Title, Author, Date, Supplier-ID, Cat-ID, EOQ, Qty on Hand, Reorder Qty
Supplier: Supplier-ID, Name, etc.
Category: Cat-ID, name

3. DFD for Sally’s Bookstore (as written)
Enter new customer info
Customer
New Customer info
Books to buy
Books to buy
Phone number
Customer Info
Process the transaction
receipt
Verify phone number
Display past history
Customer
Customer
price
Transaction data
category
Quantity sold info
Customer
Transactions
Transactions
Books
Qty on hand, EOQ
Books to be ordered information
Requirement Report
Print suggested orders
Determine order requirements
Sally
Supplier