Draw a Context as well as Level 0 Data Flow Diagram (DFD) of a Shop Sale Management System for a company sailing shops in different parts of country. The Shop Sale Management System works as follows: Ø Customer Places order. System checks availability of the customer in customer file (If he / she is already a customer). If found, then approved otherwise a new customer is created. Here new customer’s info is sent to ledger file. Ø Then the availability of shops is checked in the stock. If found, an Invoice is generated. Invoice info is sent to the customer, stock, ledger as well as sales department. Ø If shop is not available at this time, then this info is also sent to the customer. Purposes: Ensure that you can analyze existing manual system and can draw Data Flow Diagrams of any proposed system. Before Starting: Detail study of existing system. Rules for drawing DFDs. Differentiate different levels of DFDs.
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ahmed_moon