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ΔΙΑΓΡΑΜΜΑΤΑ ΡΟΗΣ ΔΕΔΟΜΕΝΩΝ PowerPoint PPT Presentation


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ΔΙΑΓΡΑΜΜΑΤΑ ΡΟΗΣ ΔΕΔΟΜΕΝΩΝ. Δαμιανός Χατζηαντωνίου Οικονομικό Πανεπιστήμιο Αθηνών. Δημιουργία Διαγραμμάτων Ροής. Για τη δημιουργία Διαγραμμάτων Ροής Δεδομένων (ΔΡΔ) πρέπει να γνωρίζουμε αρχικά : τον τρόπο λειτουργία της υποψήφιας εταιρείας

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6053918


6053918

  • () :

    • ,

  • - , - .

  • (top-down) .


6053918

  • (entity)

  • (flow of data)

  • (process)

  • (data store)

2.1

1


Context diagram

Context Diagram


Child diagrams

Child Diagrams


6053918


6053918


6053918

-


6053918

1 . . . .


6053918

D1

Prices

1

identify

item

2

look up

prices

3

compute

total cost

4

payment

&receipt

Customer

Customer

Prices

Items to

Purchase

Payment

Receipt

Amount to

be paid

Item ID

Items&

Prices


6053918

. , .


6053918

D1

COST OF TOUR

1

check

credit

3

make

reservations

D2

TRAVEL BROCHURES

AIRLINE

TRAVEL

AGENT

TOURIST

TOURIST

WITH

CHARGE

CARD

PRIVATE

TRAVEL

AGENT

CASH

PAYING

TOURIST

2

determine

tour

desired

D3

D4

TRAVEL ITENARY

CREDIT HISTORY

. 9.EX1:


6053918

D1

COST OF TOUR

1

check

credit

4

make

reservations

D2

TRAVEL BROCHURES

TOURIST

CASH

PAYING

TOURIST

AIRLINE

TRAVEL

AGENT

TOURIST

WITH

CHARGE

CARD

PRIVATE

TRAVEL

AGENT

2

determine

tour

desired

D3

D4

CREDIT HISTORY

TRAVEL ITENARY

cc#

prices

approval

cc#

tour accepted

program

cc#

profile

confirmation

. 9.EX1:


6053918

  • /

  • = /

  • / ,


6053918

D1

Prices

1

identify

item

2

look up

prices

3

compute

total cost

4

payment

&receipt

Customer

Customer

Prices

Items to

Purchase

Payment

Receipt

Amount to

be paid

Item ID

Items&

Prices


6053918

D1

D1

Temp. Trans File

UPC Price File

1

pass items

over scanner

2

look up

code and

price in

file

3

compute

total cost

4

collect money

and

give

receipt

Customer

Customer

UPC Code

Item Description

and Prices

Items to

Purchase

Payment

Receipt

Amount to

be paid

UPC Bar

Code

Items&

Prices


6053918

1:

  • .

  • .

  • .

  • bonus ( ).


6053918

  • ( ) .

  • , , .

  • .

  • .

  • . . $50 , , bonus ( ) .

  • $250 , ( bonus ).


6053918

(context diagram).

.

, (CUSTOMER) .


6053918

context .


6053918


6053918

  • : ;

  • CASH TRANSACTION. ( ).

  • , (.. , ) RENTAL INFORMATION (MANAGEMENT REPORTS) (.. ) .

  • , , .

  • (child diagram) .


9 14 1

. 9.14: 1


9 15 2

. 9.15: 2


6053918

  • .

  • , .. VIDEO MASTER FILE, CASH TRANSACTION FILE, RENTAL TRANSACTION FILE.

  • (.. Rent Video Items, Check In Customer Video Return, Add New Customer) .

  • (.. Scan Customer Rental Card, Print Customer Rental Receipt).


6053918

. 9.16:


6053918

. 9.17:


6053918

  • .

  • .

  • / , , . .

  • , .

  • ( ) .


6053918

. 9.18:


6053918

2:

  • .

  • .

  • (, , ) / ( ).


6053918

  • (master file). .

  • .

  • . . .

  • . .

  • .

  • . .

  • .

  • (Accounts Receivable) .


6053918

  • .

  • .

  • CUSTOMER, ACCOUNTING , ACCOUNTING WAREHOUSE WAREHOUSE ACCOUNTS RECEIVABLE REPORT CUSTOMER BILLING STATEMENT .

  • ( 0) .


6053918

. 9.20:


9 21 1

. 9.21: -1


6053918

  • -0 -1.

  • .

  • -1 (.. 1, 1.1, 1.2,...).

  • , .

  • 1 & 2 ( ) .


9 22 2

. 9.22: -2


9 23 2

. 9.23: -2


9 24 1

. 9.24: ( -1)


6053918

-1 ( ) .

, .


6053918

1

-

4

5

2

3

-

D3

D4

D1

D1

D2

6


6053918

5.5

5.8

5.6

5.4

-

5.2

5.3

5.1

E

5.6

D1

D6

D7

D5

D7


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