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business analysis 商业分析 babok cbap 商业分析知識體系 pmi-pba babokv3 iiba requirements management pmi requirements analysis techniques 需求管理 business case benchmarking kpi swot root cause user story sequence diagram dfd data dictionary functional decomposition business rule data flow diagram 业务分析 solution 公司分析 evaluation 解决方案评价 business analyst stakeholder communication 总复习 cdu 维护 换证 recertification argument 辩论 debate solution evaluation requirements elicitation needs assessment vendor assessment force field analysis vendor selection baselining signoff coverage matrix requirements documentation survey questionaire observation interview requirements workshop prototyping brainstorming interface analysis focus group document analysis lessons learned estimation metrics decision analysis