Why we perform accuracy parameter each one triplicate

Why do we perform accuracy parameter each one triplicate sets in validation tell me sir

ICH Guideline clear mentioned as per below point

4.3. Recommended Data
Accuracy should be assessed using a minimum of 9 determinations over a minimum
of 3 concentration levels covering the specified range (e.g., 3 concentrations/3
replicates each of the total analytical procedure).

Please refer VALIDATION OF ANALYTICAL PROCEDURES:
TEXT AND METHODOLOGY
Q2(R1)
Current Step 4 version
Parent Guideline dated 27 October 1994
(Complementary Guideline on Methodology dated 6 November 1996
incorporated in November 2005)