软件体系结构7-软件体系结构-ATAM.pptVIP

? sun@hit.edu.cn 软件体系结构评审 张平健 华南理工大学软件学院 Architectural Reviews Architectural reviews are a key step in architecture-based development. They include a method (such as SAAM or ATAM), but the full practice includes more than that.体系结构评审是开发过程中的一个重要环节。有专门的评审方法(SAAM、ATAM)，但在实践中并不仅仅是这些 We will discuss why and when cost/benefits of architectural reviews different architectural review techniques preconditions for an architectural review architectural review activities outputs from an architectural review Costs of Architectural Reviews There are three different types of costs of holding regular architectural reviews. direct staff costs直接员工开销 organizational overhead组织管理开销 indirect staff costs间接员工开销 Examples of Direct Staff Costs ATT 300 full-scale reviews done on projects of 700 staff-days or longer全面评审了300个项目，每个项目的开发时间都是700人日以上 average cost per review: 70 staff days每次评审的平均开销：70人日 Rational Software 30 reviews done on projects with at least 500 KSLOC each评审了30个项目，每个项目最少500 KSLOC average cost per review: $50,000评审平均花费：$50,000 Examples of Direct Staff Costs SAAM evaluations 12 reviews done on projects ranging from 100 KSLOC to 1,000 KSLOC12次评审，项目规模从100 KSLOC到1,000 KSLOC average cost per review: 14 to 20 staff-days平均花费：14到20人日 ATAM evaluations 12 reviews done on projects ranging from 250 KSLOC to 2,500 KSLOC12次评审，项目规模从250 KSLOC到2,500 KSLOC average cost per review: 40 to 70 staff days平均花费：40到70人日 Example of Organizational Overhead Costs of establishing a corporate review unit建立评审组的开销 management overhead communication expenses staffing the unit给评审组配备人手 relocating personnel to a central location training Example of Indirect Staff Costs Using senior designers for evaluations instead of designing让高级设计人员参与评审而不是设计 loss of productivity (due to reassignment of superior designers)生产力的下降(高级设计师被委派新任务) time spent training staff in review techniques培训员工评审技术的时间消耗 Benefits of Architectural Reviews Five different types of benefits result from holding architectural reviews. financi