I've employed someone for nearly 7 years.
Over the last year, my employee has been furloughed for periods due to our work decreasing in lockdown. During these periods, I've carried out the work usually done by this staff member, as my own usual workload has also been reduced. In doing so, it's become very apparent that this employee is somewhat slow in their work; I'm typically achieving in 2-3 hours what normally takes them a full day's work.
This is not a role that I've worked before this year and so I had no real expectation of productivity and was always happy with their work (they joined us when we first opened the business so it was very new to all of us).
However, I'm now realising that they really need to work faster and that I'm paying more than twice the wage I need to in order to get the work done, but am finding this very hard to address given that they've been doing the job for so long and until recently, I've had no complaints. I must say that they're exceptionally reliable with mistakes being very few (not that I've made any either by working at a faster pace). I think they'd be mighty offended if I raised concerns about their work given that until a year ago, I'd never done their job and they've been doing it for 7 years.
So, AIBU to bring this up when they return to work or should I just accept it as I should've realised earlier that they work slowly?