R = A1 W1 + A2 W2
= A1 (ΣB1 W1 ΣCj Wj)W1 + A2 (ΣB1 W1, ΣCj Wj)W2
where :
R = result of assessment
A1 = education quality at the first level
A2 = quality management & control at the first level
W1,W2 = the specific weighting relating to A1 and A2
Bi or Cj = items at a second level or third level
Wi,Wj = the specific weightings relating to Bi, Cj