I've only ever heard it called obsessive-compulsive disorder, but as such it's been around as one of the conditions beloved of t.v. dramas for donkeys' years and thus has come to be very much overused as a description.
Does your loved one have a diagnosed, professionally assessed disorder, or is he just very much set in his ways?
Either way, step one in doing things that he now needs help with: study his method carefully, listen to his requirements, and Get It Right. It's no good offering him support if you make him miserably uncomfortable at the same time.
P.S. I do sympathise with the irritation. The day before yesterday I hung a gentleman's lightweight jacket up by its hood instead of its collar over the newel post of his staircase; and last night I didn't hear the end of it for the full forty minutes I was there. And he's only the client's husband! - I should've let him hang his own dam' coat up.
I definitely agree with Geaton. This is something to discuss with a therapist specializing in this disorder. If it is combined with a dementia at some stage it is also relevant. I am hopeful you are POA and that you and your loved one can attend some sessions together to work through a routine that helps. Wishing you good luck. I am certain you are aware of some of the main factors involved in this disorder, and in the struggle for control, which would be all the more difficult in an aging adult who is losing control over more and more things. Do some online research as the internet is full of information. Begin a diary of particular concerns to discuss with therapist.
You can consult with a therapist who specializes in this disorder for strategies on how to engage with them and have boundaries for yourself. Also, there are probably medications that may relieve or lessen some of the symptoms. This should be thoroughly explored for your LO's sake.
Does your loved one have a diagnosed, professionally assessed disorder, or is he just very much set in his ways?
Either way, step one in doing things that he now needs help with: study his method carefully, listen to his requirements, and Get It Right. It's no good offering him support if you make him miserably uncomfortable at the same time.
P.S. I do sympathise with the irritation. The day before yesterday I hung a gentleman's lightweight jacket up by its hood instead of its collar over the newel post of his staircase; and last night I didn't hear the end of it for the full forty minutes I was there. And he's only the client's husband! - I should've let him hang his own dam' coat up.
I suspect that caregiving for a person with this level of rigidity would wear out a caregiver in short order.
Is this person going to be cared for by a family member at home or in a facility? I think a team approach would be key.