$CCC$ is a large computer manufacturing company that specializes in selling large

number of $($bulk$)$ computers at substantial discount prices to customers online. CCC

is improving its computer order processing system to process email orders of bulk

sales of its computer products.

In order to obtain any discounts, clients must first register as CCC$\text{'}$s member at

CCC$\text{'}$s website in which case certain credit checks are made such as checking credit

history of client's debt level. If the client has no bad debt history, a credit account

for the client is set up$.$ After becoming CCC$\text{'}$s member, clients may send in their

bulk orders of requested computers with their registered $CCC$ credit account details,

by email, together with a credit card payment to $CCC.$

After receiving the email of bulk orders, availability of the ordered computers is$.$

then checked in an inventory file; then the validity of the credit card payment is

checked online with client's bank. If these two checks are successful, a dispatch

paid order is sent to the client and warehouse. The warehouse is a third party

company responsible for delivery of computers to clients. If the computers ordered

are out of stock, then the order is placed on a waiting list and reconsidered at the

end of the week. If the bank does not give the credit card authorization, then the

order is sent back to the client with an explanatory note.

From the above description, draw a data flow diagram showing the flow of input

information $($and$/$or data$)$ and output information $($and$/$or data$)$ to and from

processes within this order processing system and any external environmental

elements that interact with this order processing system. You MUST use

SSADM notation $-$ see notes on data flow diagrams. In this diagram, you

must identify the following:

$($a$)$ Internal processes inside this ordering system

$(17\mathrm{.}5$ marks$)$

$($b$)$ database stores, external environmental elements that interact with any of

the processes identified in $($a$)$

$(7\mathrm{.}5$ marks$)$

$($c$)$ input and output information $($and$/$or data$)$ to and from each of the

processes, database stores and external environmental elements identified

in $($a$)$ and $($b$)$

$(11$ marks$)$

$($Hint: there are three environmental elements that interact with this order

processing system, and seven main processes in this order processing system$)$