软件体系结构体系结构评审Architectural Reviews.ppt

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1、软件体系结构体系结构评审ArchitecturalReviews孙志岗sun@hit.edu.cnArchitecturalReviewsArchitecturalreviewsareakeystepinarchitecture-baseddevelopment.Theyincludeamethod(suchasSAAMorATAM),butthefullpracticeincludesmorethanthat.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

2、Wewilldiscusscost/benefitsofarchitecturalreviewsdifferentarchitecturalreviewtechniquespreconditionsforanarchitecturalreviewarchitecturalreviewactivitiesoutputsfromanarchitecturalreview9/28/20212©sun@hit.edu.cnCostsofArchitecturalReviewsTherearethreedifferenttyp

3、esofcostsofholdingregulararchitecturalreviews.directstaffcosts直接员工开销organizationaloverhead组织管理开销indirectstaffcosts间接员工开销9/28/20213©sun@hit.edu.cnExamplesofDirectStaffCostsAT&T300full-scalereviewsdoneonprojectsof700staff-daysorlonger全面评审了300个项目，每个项目的开发时间都是700人日以

4、上averagecostperreview:70staffdays每次评审的平均开销：70人日RationalSoftware30reviewsdoneonprojectswithatleast500KSLOCeach评审了30个项目，每个项目最少500KSLOCaveragecostperreview:$50,000评审平均花费：$50,0009/28/20214©sun@hit.edu.cnExamplesofDirectStaffCostsSAAMevaluations12reviewsdoneonprojec

5、tsrangingfrom100KSLOCto1,000KSLOC12次评审，项目规模从100KSLOC到1,000KSLOCaveragecostperreview:14to20staff-days平均花费：14到20人日ATAMevaluations12reviewsdoneonprojectsrangingfrom250KSLOCto2,500KSLOC12次评审，项目规模从250KSLOC到2,500KSLOCaveragecostperreview:40to70staffdays平均花费：40到70人日9/

6、28/20215©sun@hit.edu.cnExampleofOrganizationalOverheadCostsofestablishingacorporatereviewunit建立评审组的开销managementoverheadcommunicationexpensesstaffingtheunit给评审组配备人手relocatingpersonneltoacentrallocationtraining9/28/20216©sun@hit.edu.cnExampleofIndirectStaffCostsU

7、singseniordesignersforevaluationsinsteadofdesigning让高级设计人员参与评审而不是设计lossofproductivity(duetoreassignmentofsuperiordesigners)生产力的下降(高级设计师被委派新任务)timespenttrainingstaffinreviewtechniques培训员工评审技术的时间消耗9/28/20217©sun@hit.edu.cnBenefitsofArchitecturalReviewsFivediffere

8、nttypesofbenefitsresultfromholdingarchitecturalreviews.financialforcespreparationforreview为评审做准备也是一种推动力earlydetectionofproblems尽早地发现问题validationofrequirements确认需求improvedarc