To manage test cases and test execution in Jira, you need install test management plugin. You can try synapseRT plugin, which is a very perfessional plugin to do test management and requiremement in Jira. You can find a quick introduction video from product page: https://marketplace.atlassian.com/plugins/com.go2group.jira.plugin.synapse/server/overview
Jira doesn't really do test case management, but there are a number of options on the marketplace that add them.
Note that I work for one of the vendors (albeit in a different area than our Test tool), so I'd be biased if I recommended any one of them.
I have multiple projects that use variations of the same base workflow. The variations depend on the requirements of the project or issue type. The variations mostly come in the form of new statuses ...
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