In my area, the approach taken by SS is to apply what they term the fewest restrictions possible, which generally means starting with one or two fairly short care visits a day and building up from there. In my elderly friend's case, she started with two 30 minute visits a day, and the morning one was quickly lengthened to 45 minutes because the carer was regularly spending longer than 30 minutes with her. I pushed for a lunchtime visit of 30 minutes to be added. Later, a fourth (afternoon) visit was added and both the morning and evening visits were extended by 15 minutes. After numerous falls, and four admissions to hospital in the last two months, both the hospital and SS advised that my friend now needs 24-hour supervision, either live-in care at home or care in a residential home. My friend has a pendant alarm but never used it. Prior to the last admission SS were still saying that my friend could manage at home with care visits, perhaps with a fifth one, but I think that the latest admission was the straw that broke the camel's back. I strongly suspect that the hospital told SS that my friend could not keep coming into hospital every few days and that something more was needed.
We are now trying to arrange live-in care for my friend. It will be interesting to see whether this will reduce the the number of falls she has. Even if it doesn't, my friend won't be lying on the floor for an unknown length of time, and potentially for hours, because someone will always be there.
If the person is a self-funder then you can arrange whatever you want. In my friend's case, as we don't have a PoA for health and welfare (although my husband has one for property and financial affairs) we want the backing of SS for care that my friend receives and which she is paying for because there are distant relatives around.