CMMI v1.3模型变化点 - QPM
1 主要变化点
1. 弱化了Statistically Management的概念
实践中所有的Statistical相关的内容全部被删除或替换
2. 增加了实施Root Cause Analysis的要求
3. SG和SP进行了重新组合，具备更好的逻辑性，可理解性和可操作性
2 细节变化
2.1 SG1 Prepare for Quantitative Management
1. SP1.1 Establish the Project’s Objectives
删除了一个子实践: Identify how process performance is to be measured (在后续的实践中已经覆盖)
增加了QPPO的示例
修改了Derive interim objective，完善了对interim的内容: 除了lifecycle外，增加了milestone，work product and subprocess
增加了一个子实践：识别不能达到目标的风险
2. SP1.2 Compose the Defined Process
细化了对选择subprocess的指导原则，目标是compose后能否达到QPPO
3. SP1.3 Select Subprocesses and Attributes
修改自Select the Subprocesses that Will Be Statistically Managed
主要变化是弱化了Statistial，强调了选择critical subprocess并对其实施监控 (但Attributes定义还是不清楚)
在总体说明中，提到了:
“For small projects, and other circumstances in which subprocess data may not be generated frequently enough in the project to support a sufficiently sensitive statistical inference, it may still be possible to understand performance by examining process performance across similar iterations, teams, or projects.”
在说到识别用于管理子过程的度量项时，提到了:
“For short-term projects, it may be necessary to aggregate data across similar instances of a process to enable analysis of its process performance while continuing to use the unaggregated data in support of individual projects.”
4. SP1.4 Select Measures and Analytic Techniques
强调了识别度量项时候需要考虑的内容 (其中提到了short-term projects的实施指导，需要进一步理解)
强调了Subprocess QPPO的定义并给出了示例
细化了对识别Statistical technique的说明，并给出了除了Statistical technique之外的技术(Tally sheets, Classification schemas (e.g., Orthogonal Defect Classification)，需要研究)
增加了一个子实践说明选择PPB和PPM去支持相关分析
2.2 SG2 Quantitatively Manage the Project
1. SP2.1 Monitor the Performance of Selected Subprocesses
强调了偏差和稳定性的监控并强调了deficiencies
2. SP2.2 Manage Project Performance
强调从管理项目的角度对QPPO的达成情况进行管理，SP2.1的结果可以作为这个SP的输入
3. SP 2.3 Perform Root Cause Analysis
强调对performance deficiencies进行分析 (弱化Natural bound和Common cause)