P 4-1: Prepare a narrative to describe the system depicted in the physical DFD in Figure 4.15.
A physical data is a graphical representation of a system showing the system’s internal and external
entities and the flows of data into and out of these entities.
The sales office receives orders and calls from customers taken by their representatives. The
representatives then log the call and order in the company computer. The computer then shows what
the availability and prices order's items, and checks for the customer's account. Then the computer
accesses the customer master data-disk and the accounts receivable master -disk to determine the
credit limit and compare to the outstanding accounts receivable in the system.
After the AR checked the customers accounts and letting the customer know that the order has been
accepted, the order will go to the inventory and taken out on the on-hand inventory. This is where the
tickets are created in the warehouse, to the worker to pull out the item/order. Once everything is setup in
the warehouse, the order will be shipped to the customer. Of course, the warehouse will send it to the
carrier and the carrier will communicate the customer to deliver the item.
SP 4-1: Table of Entities and Activities
Entities
Para
Activities
Cornick
1
1 Sells office product to business
IT division
1
2 Print and mail monthly statements to AR Department
AR clerk
1
3 Mail statements to Cornick’s customers
Cornick’s Customers
1
4 Mail payment to Cornick
AR clerk
1
5 Batches checks to be the cashier
6 Sends checks to the cashier
7 Uses payment stub to enter payments into computer
Computer
1
8 Update AR master data to record payment.
