IBM DevOps Code ClearCase vs. IBM Rational System Architect Designer

IBM Rational ClearCase might be better suited for a smaller / simpler code base. Larger code bases really slow it down... but then again there are better alternatives out there for source control

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If you need a whole infrastructure and architect view, IBM Rational System Architect is the way to go. If you need a single diagram or your business process is young enough to support hard documenting, you are fine with an open source tool.

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• Rational ClearCase is excellent for handling versioning and branching. No other tool I've used has the depth that ClearCase has when it comes to handling complex branching scenarios and identifying where certain versions of particular files are within a particular configuration.
• Rational ClearCase handles parallel development of many dependent applications really well.
• The use of ClearCase Views to switch between projects and configurations is extremely convenient as opposed to the local workstation model of the competitors.

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• MS Office exporting
• UML modeling
• Transformation to code
• A reverse transformation from code
• Integrates with other IBM products

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• Extremely buggy.
• Sometimes the repository gets locked for no reason.
• Slow.

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• Always has a price. And IBM is not cheap
• Sequence diagrams can get messy (still has a good UI)
• Only support few databases as backend repositories like SQL Server and Oracle

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If development is centrallized to one location and your company releases hundreds of customized versions of your software per year, then ClearCase is the best tool for managing the complexity of multiple versions of customized software. If your company has globally distributed development, then I'd recommend Team Foundation Server over ClearCase. If your organization uses Agile Methodologies, then I'd recommend TFS with GIT.

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If you have a budget or the need for a complex modeler or need diagram transformation to code or vice-versa, IBM Rational System Architect is the way to go. If you need few diagrams or don't need the complexity or don't have a budget, Bizagi or Star UML get the things done.

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• Managed code versioning for many years.
• Only one person can edit code at a time - slows processing down.
• IBM is an expensive product to support.

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• Clients like good modeling. A good diagram reduce costs in incidents and doubts of bad interpretations
• Reduce costs of recognition of old software.

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A de minimis incentive was given to thank the reviewer for their time. The incentive was not used to bias or drive a particular response, nor was the incentive contingent on a positive endorsement. More Info