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Table 1 Manual grading scale (profile grades) for forensic DNA profiles, with intervals for summarized peak heights (TPH)

From: A ranking index for quality assessment of forensic DNA profiles

Interval Profile grade
50000 ≤ TPH 1
40000 ≤ TPH < 50000 2
30000 ≤ TPH < 40000 3
25000 ≤ TPH < 30000 4
20000 ≤ TPH < 25000 5
15000 ≤ TPH < 20000 6
12500 ≤ TPH < 15000 7
10000 ≤ TPH < 12500 8
7500 ≤ TPH < 10000 10
5000 ≤ TPH < 7500 12
2500 ≤ TPH < 5000 14
1000 ≤ TPH < 2500 16
500 ≤ TPH < 1000 18
0 <TPH < 500 19
TPH = 0 20
  1. Peak heights are given in relative fluorescence units (rfu).