A Change Model in a SCM Tool

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A Change Model in a SCM Tool

• Author Ivica Crnkovic
• ABB Industrial Products.
• Wenbin Xiang

2
Agenda

• Introduction
• Overview of a change-oriented CM tool
• Change management process
• Change measurement
• Conclusion
• Question?

3
Introduction

• Is this topic related to this class?
• Software Configuration Management
• Chapter 8
• Capability Maturity Model
• Personal experience
• ClearCase (Version control)
• ClearQuest (Defect control)
• Change-oriented SCM tools
• Logical change
• Rather than component change

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Overview of SDE a Change-oriented CM Tool

• Version management - File level
• Check out a special file version
• Modify the file
• Check back in
• A new file version created
• (Maybe in your private branch, merge to main
  branch)
• What is the problem? Example

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Overview of SDE a Change-oriented CM Tool

• Configuration management - System level
• A configuration consists of a tree structure of
  subsystems
• A subsystem collects files which make a logical
  (sub)function of the system
• Reason for different configurations
• Parallel development
• Different product version
• A system version is a tag on the file
• (Create a label in Clearcase)

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Overview of SDE a Change-oriented CM Tool

• Changes in version states in the development
  process

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Overview of SDE a Change-oriented CM Tool

• Change Management
• Change Request (CR)
• Requirement Specifications
• Error Reports
• A text file
• Priority, CR type
• Creation date and termination date
• A list of files with version
• Under vision control

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Change Management Process

• Controlling change request during the development
  process

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Change Management Process

• Change request in a development process

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Change Measurements

• Software metrics in change request
• Size type metrics
• Number of changes
• States
• Classification
• Priority
• Type or function
• Number of change files
• Process metrics
• The history of every change (state)

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Change Measurements

• Spiral model and evolutionary prototype model

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Change Measurements

• Waterfall model

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Conclusion

• A change-oriented tool
• Focus from the tool to the process
• Version management remains before
• Change management more important
• Increate possibility of supervising a project
• Lead to better plan
• Know the projects final stage early
• Problems
• If the two CR related to same files?
• Private branch?

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• Questions