Real world use case of Disaster Recovery

Generally, in an organization, for every server, the system admin makes a Disaster Recovery plan document.

Let's assume that Suresh is the owner of a log monitoring tool, where developers log in to see the application logs. Once Suresh has written the DR plan document, there would be a schedule where on Wednesday, from 8 am to 10 am, the server would be shut down and this document would be given to the help desk person to restore the server. If the help desk person is able to recover the server by reading the document, then the document will be transitioned from a draft version to the final version.

This is how an organization's DR plan works properly.

Personal opinion
I was always a bit too lazy to prepare lengthy disaster recovery plan documents. After all, if we prepare a proper lengthy DR plan document, it would take a long time to read and follow for the person recovering it. So, I would always associate a video tutorial along with the document and almost all the time, the help desk person used to watch the video tutorial and recovery was much faster and more efficient.