Most seasoned professional software engineering teams probably understand the immense value of DVCS in their jobs, but it seems to me that the concepts of DVCS isn't used much outside of software engineering, even when DVCS has existed for way more than a decade already, which is quite a pity for me.

So how DVCS can be used outside of software engineering? Let's show it using the following example:

1. You've a front-line customer service job(sitting on a booth with the customer on the other side while you're using a computer to do the work) which demands you to strictly follow a SOP covering hundreds of cases(each of your cases will be checked by a different supervisor but no one knows who that supervisor will be beforehand), and the most severe SOP breach can cause you to end up going to jail(because of unintentionally violating serious legal regulations)
2. You've to know what cases should be handled by yourselves and what have to be escalated to your supervisors(but no one knows which supervisor will handle your escalation beforehand), because escalating too many cases that could've been handled by yourselves will be treated as incompetent and get yourselves fired, while handling cases yourselves that should've been escalated is like asking to be fired immediately
3. As the SOP is constantly revised by the upper management, it'll change quite a bit every several weeks on average, so the daily verbal briefing at the start of the working day is always exercised, to ensure all of you will have the updated SOP, as well as reminding what mistakes are made recently(but not mentioning who of course)
4. Clearly, a SOP of this scale with this frequency and amount of changes won't be fully written in a black and white manner(it'd cost hundreds of A4 papers per copy), otherwise the company would've to hire staffs that are dedicated to keep the SOP up to date, in which the company will of course treat this as ineffective and inefficient(and wasting tons of papers), so the company expects EVERYONE(including the supervisors themselves) to ALWAYS have ABSOLUTELY accurate memory when working according to the SOP
5. As newcomer joins, they've about 2 months to master the SOP, and senior staff of the same ranks will accompany these newcomers during this period, meaning that the seniors will verbally teach the newcomers the SOP, using the memory of the former and assuming that the latter will remember correctly

Needless to say, the whole workflow is just asking for trouble, because:

1. Obviously, no one can have absolutely accurate memory, especially when it's a SOP covering hundreds of cases, so it's just incredibly insane to assume that EVERYONE ALWAYS have ABSOLUTELY accurate memory on that, but that's what the whole workflow's based on
2. As time passes, one's memory will start to become more and more inaccurate gradually(since human's memory isn't lossless), so eventually someone will make a mistake, and the briefing on the upcoming several days will try to correct that, meaning that the whole briefing thing is just an ad-hoc, rather than systematic, way to correct the staff's memories
3. Similarly, as newcomers are taught by the seniors using the latter's memory, and human communications aren't lossless either, it's actually unreasonable to expect the newcomers to completely capture the SOP this way(because of the memory loss of the seniors, the information loss in the communication, and the memory loss of the newcomers, which is essentially the phenomenon revealed by Chinese whipsers), even when they've about 2 months to do so
4. As each of your cases will be checked by a different supervisor and no one knows who that supervisor will be beforehand, and supervisors will also have memory losses(even though they'll usually deny that), eventually you'll have to face memory conflicts among supervisors, without those supervisors themselves even realizing that such conflicts among them do exist(the same problem will eventually manifest when you escalate cases to them, and this includes whether the cases should actually be escalated)
5. Therefore, overtime, the memories on the SOP among the staff will become more and more different from each other gradually, eventually to the point that you won't know what to do as the memory conflicts among the supervisors become mutually exclusive at some parts of the SOP, meaning that you'll effectively have to gamble on which supervisor will handling your escalation and/or check your case, because there's no way you can know which supervisor will be beforehand

Traditionally, the solution would be either enforcing the ridiculously wrong assumption that EVERYONE must ALWAYS have ABSOLUTELY accurate memory on a SOP worth hundreds of A4 papers even harder and more ruthlessly, or hiring staff dedicated to keep the written version of the SOP up to date, but even the written version will still have problems(albeit much smaller ones), because:

1. As mentioned, while it does eliminate the issue of gradually increasing memory conflicts among staff overtime, having a written version per staff member would be far too ineffective and inefficient(not to mention that it's a serious waste of resources)
2. When a written version of the SOP has hundreds of A4 papers and just a small parts of the SOP change, those staff dedicated to keep the SOP up to date will have to reprint the involved pages per copy and rearrange those copies before giving them back to the other staff, and possibly highlight the changed parts(and when they're changed) so the others won't have to reread the whole abomination again, and this will constantly put a very heavy burden on the former
3. Because now the staff will rely on their own copies of the written version of the SOP, if there are difference among those written versions, the conflicts among the SOP implementations will still occur, even though now it'd be obvious that those staff dedicated to keep the SOP up to date will take the blame instead(but that'd mean they'll ALWAYS have to keep every copy up to date IMMEDIATELY, which is indeed an extremely harsh requirement for them)
4. As it'd only be natural and beneficial for the staff to add their own notes onto their own copies of the written version of the SOP, when those written versions get updated, some of their notes there can be gone because those involved pages will be replaced, so now those staff might have to rewrite those notes, regardless of whether they've taken photos on those pages with their notes beforehand(but taking such photos would risk violating the SOP), which still adds excessive burden on those staff
5. As you're supposed to face customers at the other side of the booth while you're using a computer to do the work, it'd be detrimental on the customer service quality(and sometimes this can lead to the customer filing formal complaints, which are very major troubles) if you've to take out the written version of the SOP in front of the customer when you're not sure what to do in this case, even though it's still way, way better than screwing up the cases

Combining all the above, that's where DVCS for the SOP can come into play:

1. Because now the written version of the SOP is a soft copy instead(although it still works for soft copies without DVCS), this can be placed inside the system and the staff can just view it on the computer without much trouble, because the computer screen isn't facing the customer(and this largely mitigates the risk of having the staff leak out the written version of the SOP)
2. Because the written version of the SOP's now in a DVCS, each staff will have its own branch or fork of the SOP, which can be used to drop their own private notes there as file changes(this assumes that the SOP is broken down into several or even dozens of files but this should be a given), and their notes can be easily added back to the updated versions of the files having those notes previously added, by simply viewing the diff of those files(or better yet, those notes can also be completely separate files, although it'd mean the staff have to know which note files corresponds to which SOP files, which can be solved by carefully naming all those files and/or using well-named folders)
3. Because the written version of the SOP's now centralized in the system(the master branch), every staff should've the same latest version, thus virtually eliminating the problems caused by conflicts among different written versions from different staff members, and the need of the dedicated manual work to ensure they'll remain consistent
4. Clearly, the extra cost induced from this DVCS application is its initial system setup and the introduction to newcomers of using DVCS at work, which are all one time costs instead of long-term ones, and compared to the troubles caused by other workflows, these one time costs are really trivial
5. Leveraging the issues and pull requests features(but using blames as well might be just too much) in any decent DVCS, any staff can raise concerns on the SOP, and they'll either be solved, or at least the problems will become clear for everyone involved, so this should be more effective and efficient than just verbal reflections towards any particular colleagues and/or supervisors on difficulties faced(if called for, anonymous issues and pull requests can even be used, although it'd seem to be gone overboard)

So the detailed implementation of the new workflow can be something like this:

1. The briefing before starting the work of the day should still take place, as it can be used to emphasize the most important SOP changes and/or the recent mistakes made by colleagues(as blames not pointing to anyone specific) in the DVCS, so the staff don't have to check all the recent diffs themselves
2. Whenever you're free, you can make use of the time to check the parts in the SOP of your concern from the computer in your booth, including parts being unclear to you, recent changes, and even submit an anonymous issue for difficulties you faced on trying to follow those parts of the SOP(or you can try to answer some issues in the DVCS made by the others as a means of helping them without having to leave your booth or explicitly voice out to avoid disturbing the others)
3. When you're facing a customer right in front of you and you're unsure what to do next, you can simply ask the customer to wait for a while and check the involved parts of the SOP without the customer even noticing(you can even use issues to ask for help and hope there are colleagues that are free and will help you quickly), thus minimizing the damages caused to the customer service quality
4. To prevent the DVCS from being abused by some staff members as a poor man's chat room at work, the supervisors can periodically check a small portions of the issues, blames and pull requests there as samples to see if they're just essentially conversations unrelated to work, and the feature of anonymity can be suspended for a while if those abusers abuse this as well(if they don't use anonymity when making those conversations, then the supervisors can apply disciplinary actions towards them directly), but don't always check all of them or those supervisors would be exhausted to death due to the potentially sheer number of such things
5. Of course, you still have to try to master the SOP yourselves, as the presence of this DVCS, which is just meant to be an AUXILIARY of your memory, doesn't mean you don't have to remember anything, otherwise you'd end up constantly asking the customer to have unnecessary waits(to check the SOP) and asking colleagues redundant questions(even with minimal disruptions), causing you to become so ineffective and inefficient all the time that you'll still end up being fired in no time

Of course, it's easier said than be done in the real world, because while setting up a DVCS and training new comers to use it are both easy, simple and small tasks, the real key that makes things complicated and convoluted is the willingness for the majority to adopt this totally new way of doing things, because it's such a grand paradigm shift that's wholeheartedly alien to most of those not being software engineers(when even quite some software engineers still reject DVCS in situations clearly needing it, just think about the resistance imposed by the outsiders).

Also, there are places where DVCS just isn't suitable at all, like emergency units having to strictly follow SOPs, because the situations would be too urgent for them to check the SOP in DVCS even if they could use their mobile phones under such circumstances, and these are some cases where they do have to ALWAYS have ABSOLUTELY ACCURATE memories, as it's already the least evil we've known so far(bear in mind that they'd already have received extensive rigorous training for months or even years before being put into actions)

Nevertheless, I still believe that, if some big companies having nothing to do with software engineering are brave enough to use some short-term projects as pilot schemes on using DVCS to manage their SOPs of their staffs, eventually more and more companies will realize the true value of this new ways of doing things, thus causing more and more companies to follow, eventually to the point that this becomes the norm across multiple industries, just like a clerk using MS Office in their daily works.

To conclude, I think that DVCS can at least be applied to manage some SOPs of some businesses outside of software engineering, and maybe it can be used for many other aspects of those industries as well, it's just that SOP management is the one that I've personally felt the enormous pain of lacking DVCS when it's obviously needed the most.