Software Configuration Management (scm)



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Change Control

  • Engineering change order (ECO)
    • generated for each change approved (describes change, lists the constraints, and criteria for review and audit)
  • Object to be changed is checked-out of the project database subject to access control parameters for the object
  • Modified object is subjected to appropriate SQA and testing procedures

Change Control

  • Modified object is checked-in to the project database and version control mechanisms are used to create the next version of the software
  • Synchronization control
    • used to ensure that parallel changes made by different people don’t overwrite one another

Change Control Process—I


change request from user
developer evaluates
change report is generated
change control authority (CCA) decides
request is queued for action,
Engg. Change Order (ECO)
is generated
change request is denied
need for change is recognized
change control process—II
user is informed

Change Control Process-II


assign people to SCIs
check-out SCIs
make the change
review/audit the change
establish a “baseline” for testing
change control process—III
Check-in SCIs that have been changed

Change Control Process-III


perform SQA and testing activities
Promote changes for inclusion in next release
rebuild appropriate version of software
review/audit the change to all configuration items
include changes in new version (release)
Distribute new version
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