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Configuration Management Main issues: manage items during software life cycle usually supported by powerful tools
SE, Configuration Management, Hans van Vliet, ©2008 2 Configuration management tasks identification and definition of configuration items, such as source code modules, test cases, requirements specification managing changes and making configuration items available during the software life cycle, usually through a Configuration Control Board (CCB) keeping track of the status of all items (including the change requests) crucial for large projects
SE, Configuration Management, Hans van Vliet, ©2008 3 Configuration Control Board ensures that every change to the baseline (change request - CR) is properly authorized and executed CCB needs certain information for every CR, such as who submits it, how much it will cost, urgency, etc CCB assesses the CR. If it is approved, it results in a work package which has to be scheduled. so, configuration management is not only about keeping track of changes, but also about workflow management
SE, Configuration Management, Hans van Vliet, ©2008 4 Workflow of a change request change request (CR) investigate schedule work implement change approve reject defer notify owner request info
SE, Configuration Management, Hans van Vliet, ©2008 5 Tool support for configuration management if an item has to be changed, one person gets a copy thereof, and meanwhile it is locked to all others new items can only be added to the baseline after thorough testing changes in the status of an item (e.g. code finished) trigger further activities (e.g. start unit testing) old versions of a component are kept as well, resulting in versions, like X.1, X.2, … we may even create different branches of revisions: X.2.1, X.2.2, … and X.3.1, X.3.2,...
SE, Configuration Management, Hans van Vliet, ©2008 6 Functionalities of SCM tools Components (storing, retrieving, accessing, …) Structure (representation of system structure) Construction (build an executable) Auditing (follow trails, e.g. of changes) Accounting (gather statistics) Controlling (trace defects, impact analysis) Process (assign tasks) Team (support for collaboration)
SE, Configuration Management, Hans van Vliet, ©2008 7 Models of configurations version-oriented: physical change results in a new version, so versions are characterized by their difference, i.e. delta change-oriented: basic unit in configuration management is a logical change identification of configuration becomes different: “baseline X plus fix table bug” instead of “X3.2.1 + Y2.7 + Z3.5 + …”
SE, Configuration Management, Hans van Vliet, ©2008 8 Evolution of SCM tools Early tools: emphasis on product-oriented tasks Nowadays: support for other functionalities too. They have become a (THE) major tool in large, multi-site projects Agile projects: emphasis on running system: daily builds
SE, Configuration Management, Hans van Vliet, ©2008 9 Configuration Management Plan Management section: organization, responsibilities, standards to use, etc Activities: identification of items, keeping status, handling CRs
SE, Configuration Management, Hans van Vliet, ©2008 10 Summary CM is about managing al kinds of artifacts during software development Crucial for large projects Supported by powerful tools
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