Please provide some context, some helpful hints, and other information if you can!
I have two projects that are making me think this:
When you make frames with a homemade jig, it is often the case that the jig is at 44.8º through the center of the 90º. You can compensate with this by making one cut on one side, and the other cut on the other side. No regular person can notice this 'error' because of how you compensate.
I am making a bed frame. Think of an 'H' with a top bar on it. When cutting the mortises on the top part to secure it to the two verticals (middle bar is already complete) I clamped the top bar to the completed 'H' to measure it was square. Did the measure 6 times cut once thing, and somehow when going back to dry fit, the top part of the frame isn't 100% square. Im measuring 62.75" and 63.125" .
Obviously I am a bit of a perfectionist, but when I frame a house, I can make a 40' wall vertically square and plumb to less than a eighth" before securing. So there has to be some acceptable tolerances depending on the circumstances. Is there a formula? a percentage? something else?
So what is your tolerance in your area of work? How do you handle errors? Know any tricks?