snowline limited has a purchasing system that works as follows. the raw material inventory manager notifies purchasing department when inventory falls below reorder point. purchasing department issues a purchase order to supplier. the goods and invoices go to the receiving department where they are counted and the packaging slip matched against a copy of purchase order. at the end of the month, the billing department checks that all adequate departmentation is present and produces a payment voucher which is processed by cash disbursement clerk who prepares a cheque for the accountant's signature. the cheque is forwarded to the supplier by the acoount's office. draw a context diagram and level 0 DFD for teh system
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