Transcript ERA Physical DFD

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From a client restaurant a representative will pick up a signed order sheet from the
restaurant manager for the quantities desired of each item sold by ERA.
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From his (her) car, the representative connects to ERA’s order processing computer
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package using a laptop computer and a cellular phone. The representative enters the
customer number into the computer; and then enters item numbers and quantities of each
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item requested.
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The computer captures the customer number and order information and then reads the 9
accounts receivable master file to verify that the customer has sufficient credit to allow
the transaction. If the transaction is allowed, the computer then displays an approval 10
screen on the representative’s computer and records the sales information in a “sales
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order database” and prints two copies of the sales order on a laser printer in the
representative’s car.
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5
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The representative reconciles the printed sales order to the request he keyed in and then
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enters a code into the computer to execute the sales transaction. When the
representative enters the code, the computer updates the sales order database and the
accounts receivable master file to reflect the execution. The representative takes a copy
of the sales order to the manager of the restaurant.
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1, 2, 3, 4, 8, 9, 10, 11, 12, 5, 6, 13, 7
1, 2, 3, 4, 8, 9, 10, 11, 12, 5, 6, 13, 7
ERA
Table of Activities
Representative
1.
2.
3.
4.
5.
6.
7.
Pick up a signed order sheet.
Connects to computer.
Enters customer number.
Enters item numbers and quantities requested.
Reconciles the sales order to the request.
Enters a code to execute.
Takes a copy to the sales manager
Computer
8. Captures customer number and order information.
9. Verifies customer credit.
10. Displays approval screen.
11. Records sales information in “sales order database.”
12. Prints two copies of the sales order.
13. Updates SO database and A/R master file.
Physical DFD
Restaurant
manager
1, 2, 3, 4, 8, 9, 10, 11, 12, 5, 6, 13, 7
Sales order
1
Signed order
sheet
7
3
Representative
Cust number
4
2
Items
requested
11
5
approval
10
6
Execute code
Sales order
12
Sales order database
Computer
8
13
13
9
A/R master file
Physical DFD
Restaurant
manager
Sales order
Signed order
sheet
Representative
Cust number
Items
requested
approval
Execute code
Sales order
Sales order database
Computer
A/R master file