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The ATAM method

The ATAM method. The ATAM method (1/2). Architecture Tradeoff Analysis Method Requirements for complex software systems Modifiability Performance Security Interoperability Portability Reliability How to make sure our system implements these quality attributes?.

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The ATAM method

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  1. The ATAM method

  2. The ATAM method (1/2) • Architecture Tradeoff Analysis Method • Requirements for complex software systems • Modifiability • Performance • Security • Interoperability • Portability • Reliability • How to make sure our system implements these quality attributes?

  3. The ATAM method (2/2) • Method for evaluating software architectures relative to quality attribute goals • Reveals architectural risks • Consists of nine steps in four groups: • Presentation of system • Analysis addressing key quality attribute requirements • Testing involving important stakeholders • Reporting

  4. Why ATAM? • Motivation • Clarified quality attribute requirements • Improved architecture documentation • Risk identification • Not ARID (Active Reviews for Intermediate Designs) because • Risks hard to identify when nothing implemented yet • Would have meant redundant extra work

  5. Gencode and ATAM • Chief architect, project manager and software engineers arrange a meeting • The meeting will follow the steps of ATAM (presented in the following) • Schedule • First meeting after the first implementation phase • Assessment of architecture in its first implementation phase • Report deficiencies, make plan on how to change these • Follow-up meeting after second implementation phase • Assessment of situation against the findings from first meeting

  6. 1. Presentation of system • Present the ATAM (1st meeting) • Elina • Present business drivers • Client (Kari) makes an update on which business goals are motivating the development • What are the primary architectural drivers (e.g. some system component, security, speed etc.) • Present architecture • Chief architect (Petri) presents current state

  7. 2. Analysis • Identify architectural approaches • Generate quality attribute utility tree • Elicitation of quality factors • Present scenarios • Analyze architectural approaches against quality attributes

  8. 3. Testing • Brainstorm and prioritize scenarios • Analyze architectural approaches • Highly ranked scenarios from step 6 become test cases • Analysis may uncover additional architectural approaches and risks • Documentation

  9. 4. Reporting • Presentation of results • Documentation

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