A phenomenon well known to health and safety professionals (but clearly less known by the health and safety amateurs so often found throwing their weight about in industry) is something called revenge effects.
Revenge effects are a bit like drug side effects in so much as the very attempt that is made to make things better often introduces a new set of hazards. Sometimes the revenge effect is more hazardous than the original issue. Sometimes the revenge effect lays undiscovered for years.
Revenge effects are very common, and when I encounter some H+S billshut, I usually look for the revenge effect (just for grins, like a hobby….).
As a climber of decades standing, who started working a few years back on a utility network that insists on two rope working, I was intrigued what the revenge effects of the twin system business would be. The obvious ones to spring to mind have already been mentioned in this thread…
> error due to over complication
> fatigue due to making simple jobs into a faff.
> poor work positioning due to compromising on anchor point placement because you just can’t be arsed to move multiple tips multiple times.
> fatigue due to more kit to lug across two ploughed fields and a marshy bog.
> waste of financial resources that could be more effectively spent elsewhere.
> etc.
In reality, the real revenge effect became apparent much later, and it was this:
I am a real fan of high anchor points. A good high anchor means that jobs which others can’t do become a piece of cake. I am too old to struggle, so I always tie in as high as I can as point of principle. I generally make good choices, and until recently, rarely had that many snap out on me.
For me, if you always have two anchor points, you start thinking that as long as one is well selected and sturdy, and the other can ‘push the envelope’ a bit (you do, after all, have backup to catch you…. Literally).
It is surprising just how much you can rely on a really shabby anchor point when you start using them on a regular basis. Human nature is that once you start becoming conditioned to making poor anchor point choices, you make them on a more and more regular basis, which I guess is OK…. but only up to the point where neither anchor point turns out to really be that good……