If you get atleast 962 on all of those stats (OQ, SR, UT) it gives a 100% result, because its 33% out of 100%. I don't know if they say 1000 = 100% so a OQ of 960 = 96% or if they take it eg: OQ:955 = 100% of the resource Quality, now you say 955 = 100%, 4% from 955 = x to calculate the final result.
Good thing is that if you take an exact look, that the 3 stats needed on the Armor piece are for Condition, and as Armor won't get damaged with time it doesn't matter realy if you use 962 on all or not.
I say that you need atleast 962, though 960 also can get 100% at the end......I think this explains all the calculating at the top a little easier

Most shematics use 2 different stats some 3, getting 962 on all will give you a chance to get 100% on the experimentation line you use points on......if you have a high experimentation rate you get more points----> stack luck to get more Amazing or critical successes, this leats to the fact that you can spend more points on a second or 3th experimentation row because the effect of amazing and critical success just gives an extra on how fast you get to 100%. At the ende you can balance eg: a Weapon on dps, dmg and elemental values....problem is that sometimes if you get always amazing or critical is that you arrive at 98% and if you spend a point now you will waste it, because a usual experimentation roll give around 4-6% or more.
Thats why Assembly is important and the resources you use, because the better they are the higher the stats before you start experimentation ---> Overall Quality of the Item is good, mabe it lacks 2-4 points on dps but at the dmg and elemental value it holds more points.