Large operators often have the same task written up several times across sites or by different authors, with small differences in steps or wording. Rewriting all of them is wasted effort, and keeping all of them means an operator can easily open the wrong one.
Before a rewrite, it is worth comparing the whole library by content instead of by title, since two procedures with different names can describe the same job. Once the overlaps are found, you decide which differences are real, like site equipment or local conditions, and which are just drift that crept in over the years. AI is good at this kind of comparison across thousands of documents, and it means you only digitize and maintain the versions you actually need.