$1.$ Consider the ATM user stories as the set of scenarios to analyze.

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$2.$ Assume the Use Cases provide a complete specification of the system requirements, constraints, and environmental description. If something is needed that is missing$-$ define it now before proceeding.

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$3.$ Select $3$ candidate architectures for the ATM system and answer the questions below for each as a way and discuss how the selected architecture address the scenarios and requirements $($module view, process view, data flow view$)$

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Control questions

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How is control managed within the architecture?

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Does a distinct control hierarchy exist?

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How do components transfer control within the system?

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How is control shared among components?

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What is the control topology?

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Is control synchronized or asynchronous?

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Data questions

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How are data communicated among components?

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Is the flow of data continuous or sporadic?

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What is the mode of data transfer?

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Do data components exist? If so what is their role?

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How do functional components interact with data components?

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Are data components active or passive?

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How do data and control interact within the system?

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$4.$ Assess the quality attributes for each candidate architecture independently

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Reliability

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Performance

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Security

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Maintainability

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Flexibility

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Testability

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Portability

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Reusability

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Interoperability

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$5.$ Identify sensitivity points for architecture by trying to make small changes to each architecture candidate and see what the impact of the change is on each $($e$.$g$.$ consider the effect of adding a second bank branch were to the system$).$

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$6.$ Critique candidate architectures $($from step $3)$ using the sensitivity analysis $($conducted in step $5)$

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Key question $$ why did you select one of the architecture candidates as the winner?

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Why did you reject each of the other two?