What is the Systems Analysis Phase? What is the end product of this phase? Describe Functional

What is the Systems Analysis Phase? What is the end product of this phase? Describe Functional Decomposition Diagrams and Data Flow Diagrams

What is the Systems Analysis Phase? What is the end product of this phase? Describe Functional Decomposition Diagrams and Data Flow Diagrams (DFD). How are they similar? How are they different? Describe in 250 words or more.
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