CMMI v1.3模型變化點 - QPM

1      主要變化點

1.     弱化了Statistically Management的概念

實踐中所有的Statistical相關的内容全部被删除或替換

2.     增加了實施Root Cause Analysis的要求

3.     SG和SP進行了重新組合，具備更好的邏輯性，可了解性和可操作性

2      細節變化

2.1   SG1 Prepare for Quantitative Management

1.     SP1.1 Establish the Project’s Objectives

删除了一個子實踐: Identify how process performance is to be measured (在後續的實踐中已經覆寫)

增加了QPPO的示例

修改了Derive interim objective，完善了對interim的内容: 除了lifecycle外，增加了milestone，work product and subprocess

增加了一個子實踐：識别不能達到目标的風險

2.     SP1.2 Compose the Defined Process

細化了對選擇subprocess的指導原則，目标是compose後能否達到QPPO

3.     SP1.3 Select Subprocesses and Attributes

修改自Select the Subprocesses that Will Be Statistically Managed

主要變化是弱化了Statistial，強調了選擇critical subprocess并對其實施監控 (但Attributes定義還是不清楚)

在總體說明中，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.”

在說到識别用于管理子過程的度量項時，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

強調了識别度量項時候需要考慮的内容 (其中提到了short-term projects的實施指導，需要進一步了解)

強調了Subprocess QPPO的定義并給出了示例

細化了對識别Statistical technique的說明，并給出了除了Statistical technique之外的技術(Tally sheets, Classification schemas (e.g., Orthogonal Defect Classification)，需要研究)

增加了一個子實踐說明選擇PPB和PPM去支援相關分析

2.2   SG2 Quantitatively Manage the Project

1.     SP2.1 Monitor the Performance of Selected Subprocesses

強調了偏差和穩定性的監控并強調了deficiencies

2.     SP2.2 Manage Project Performance

強調從管理項目的角度對QPPO的達成情況進行管理，SP2.1的結果可以作為這個SP的輸入

3.     SP 2.3 Perform Root Cause Analysis

強調對performance deficiencies進行分析 (弱化Natural bound和Common cause)