i m doing the system analysis phase 4 my shopping cart application.its a college small scale project.the user of the shopping cart can be wither a customer or an administrator.so i have made the dfds keeping in mind the customer.my question is whether separate dfd is 2 be made for the administrator or we have 2 incorporate both customer and administrator in the same dfd.and what else do i need 2 do in this analysis phase besides er diagrams and dfd?what is a decision tree and should it be made for the analysis phase?
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