Explain the purpose of data flow diagram.

Consider the following scenario: “The level of credit you are allowed depends on whether you are a trade customer or private customer. If you are a trade customer then the specific level of credit allowed is determined by your loyalty as follows: if you have been a customer for 5 years or more then you are allowed credit up to £10,000 otherwise your credit limit is £5,000. For private customers, you are eligible for credit if you are earning over £25,000 per year. If you are eligible and your existing unsecured debt is less than £10,000 then your credit limit is £5,000 otherwise it is £1,000.”

You are required to construct: a. Structured English b. Decision Table c. Decision Tree

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Data Flow Diagram DFD is a graphical representation of a systems data flow and processes Its purpo... View the full answer