I ran across this idea recently.
From the CAPM Official Certification guide by PMI and published by Pearson, Inc (ISBN-13: 978-0137918096), pg. 25...
"Project-based operations: …this approach is a way of breaking operations into separately managed modules or tasks, each of which can then be individually sequenced, tracked, and measured to achieve a reliable outcome for a singe customer. This adheres to the original definition of a project: a unique outcome with a definite beginning and a definite ending, involving the specific tasks needed to achieve it. Looking at operations this way can provide a level of increased efficiency and quality that is common for project management as opposed to what would otherwise be simply ongoing daily operations."
The example given in the text is ordering a customized car from a dealer. Assembling a vehicle is operational, the specific configuration for a specific customer would be project oriented. From an IT perspective, monthly updating/patching of systems may be operational, but a limited timeframe and specific updates and dependencies would be project oriented.