Draw the DFD for this Detailed Subprocesses for Key Components

$1\mathrm{.}0$ Order Management System $($DFD Level $2)$

$1\mathrm{.}1$: Receive order details from the website or app.

$1\mathrm{.}2$: Check product availability in stock.

$1\mathrm{.}3$: Generate order confirmation and send to the customer.

Data Flow:

Input: Customer order.

Output: Order confirmation, stock update.

$2\mathrm{.}0$ Payment Handling $($DFD Level $2)$

$2\mathrm{.}1$: Validate payment method $($MPESA$,$ Bitcoin, credit$/$debit card$).$

$2\mathrm{.}2$: Route payment request to the appropriate gateway.

$2\mathrm{.}3$: Confirm payment and update the order status.

$2\mathrm{.}4$: If cash$-$on$-$delivery, flag for courier collection.

Data Flow:

Input: Payment request.

Output: Payment confirmation, order status update.

$3\mathrm{.}0$ Customer Credit Verification $($DFD Level $2)$

$3\mathrm{.}1$: Check if order value exceeds KES $50,000.$

$3\mathrm{.}2$: Query customer history to check for eligibility.

$3\mathrm{.}3$: Approve or reject credit request.

$3\mathrm{.}4$: Notify customer of decision.

Data Flow:

Input: Order details, customer credit history.

Output: Credit approval or denial notification.

$4\mathrm{.}0$ Order Fulfillment and Delivery $($DFD Level $2)$

$4\mathrm{.}1$: Prepare goods for dispatch.

$4\mathrm{.}2$: Assign delivery to courier.

$4\mathrm{.}3$: Update stock and notify the customer.

$4\mathrm{.}4$: Confirm delivery completion and payment $($if cash$-$on$-$delivery$).$

Data Flow:

Input: Confirmed order.

Output: Delivery confirmation, stock update.

$5\mathrm{.}0$ Returns Management $($DFD Level $2)$

$5\mathrm{.}1$: Receive return request from customer.

$5\mathrm{.}2$: Forward request to the internal audit department.

$5\mathrm{.}3$: Audit reviews and approves or denies the request.

$5\mathrm{.}4$: Notify the customer of the outcome.

Data Flow:

Input: Return request.

Output: Approval$/$rejection notification, stock adjustment $($if approved$).$

$6\mathrm{.}0$ Accounting and Reporting $($DFD Level $2)$

$6\mathrm{.}1$: Record successful payments and outstanding credit sales.

$6\mathrm{.}2$: Process refunds for approved returns.

$6\mathrm{.}3$: Generate financial reports for management.

$6\mathrm{.}4$: Monitor and track accounts receivable.

Data Flow:

Input: Payment confirmations, credit approvals, return approvals.

Output: Financial reports, updated revenue records.