It seems that many people somehow try to define the software development process using a DevOps tools model but there is no alignment; still I assume that this is more a question of maturity/alignment, not of matter of taste.
Question: What are further known DevOps operation models?
Some examples I've seen at available popular sources:
Plan, Develop, Test, Release, Operate
Plan, Code, Build, Test, Release, Deploy, Operate, Monitor
Requirements, Development, Build, Testing, Deployment, Execution
Here is a quote from the Wikipedia page for the DevOps toolchain:
A DevOps toolchain is a set or combination of tools that aid in the delivery, development, and management of applications throughout the software development lifecycle, as coordinated by an organisation that uses DevOps practices.
Generally, DevOps tools fit into one or more activities, which supports specific DevOps initiatives: Plan, Create, Verify, Preprod, Release, Configure, and Monitor.
Another proposed toolchain model was referenced in 2014 as coming from "an unknown source" as Plan, Code, Build, Test, Release, Deploy, Operate and Monitor.
However, that same Wikipedia page also contains an image which looks like so:
This image, IMO, does not correlate with the text on that page.
DevOps Toolchain stages on Wikipedia, By Kharnagy - Own work, CC BY-SA 4.0Wikipedia