There is already a scale to determine your execution. Score. Nothing else matters.
Practice is the time to grade your execution, when the arrows are up it is time to worry about score.
If I had a dollar for every time I heard a guy that just shot 620 say "but I threw it great"……………… Uh, no you didn't.
So why have I had nights shooting 750 and knowing I didn't throw it very well? Is the appropriate answer, "uh, yes I did"?
I know I don't bowl on some of you guys level 600 is a good series for me. Two weeks ago went out and threw 677. Everybody was coming by telling me what a great series. I bowled like crap just got lucky on a lot of shots and I knew it.
Sometimes luck plays a bigger factor than others. If we are honest with our selves we know when its luck and when its bowling well.
My point is individually relative. FOR ME, I know there are nights where I've thrown the ball well and consistently got some rough breaks along the way, but still other nights where I have scored well (in some cases VERY well) knowing full well I didn't throw the ball nearly as well as one of my average to below average nights on a THS. My point, under your example of you is (true or false on a given night?): "Everybody was coming by telling me what a
great bad series. I bowled
like crap well just got
unlucky on a lot of shots and I knew it".
That would be possible.
BTW, lol at anyone that would say "what a bad series"
Over a large enough sample, especially on a THS, there will be nights where execution is there and you don't score and nights where execution is not there and you score well. JMO