🏆 Standard Complexity Rankings

Not all standards are equal. Complexity scores help you quickly gauge how difficult a standard will be to understand and implement.

💡 How Complexity Scores Are Calculated

Four factors combine to produce a 0–10 complexity score. Higher means more demanding.

📖
Reference Count
How many other standards this one references
🗺
ICS Breadth
Number of distinct classification categories
📝
Scope Length
Word count of the scope description
🔨
Type Weight
Specification, guide, or terminology — weighted by complexity
RankStandardScoreLevel
1
EN ISO 12100-1:2003 1124 refs · Score 0.2 Compare with IEC 60529:1989 →
0.2
Easy
2
IEC 60529:1989 1122 refs · Score 0.2 Compare with EN ISO 12100-1:2003 →
0.2
Easy
3
ISO 5725-2:1994 1112 refs · Score 0.2 Compare with EN 60204-1:2006 →
0.2
Easy
4
EN 60204-1:2006 1105 refs · Score 0.2 Compare with ISO 5725-2:1994 →
0.2
Easy
5
EN 10204:2004 1099 refs · Score 0.2 Compare with GOST 12.1.004-1991 →
0.2
Easy
6
GOST 12.1.004-1991 1085 refs · Score 0.2 Compare with EN 10204:2004 →
0.2
Easy
7
GB/T 3921-2008 1070 refs · Score 0.2 Compare with ASME Y14.5M-1994 →
0.2
Easy
8
ASME Y14.5M-1994 1055 refs · Score 0.2 Compare with GB/T 3921-2008 →
0.2
Easy
9
GB/T 4208-2017 1053 refs · Score 0.2 Compare with GB/T 2423.1-2008 →
0.2
Easy
10
GB/T 2423.1-2008 1033 refs · Score 0.2 Compare with GB/T 4208-2017 →
0.2
Easy
11
GB/T 2423.2-2008 996 refs · Score 0.2 Compare with EN ISO 12100-2:2003 →
0.2
Easy
12
EN ISO 12100-2:2003 994 refs · Score 0.2 Compare with GB/T 2423.2-2008 →
0.2
Easy
13
EN ISO 3696:1995 975 refs · Score 0.2 Compare with GOST 4328-1977 →
0.2
Easy
14
GOST 4328-1977 967 refs · Score 0.2 Compare with EN ISO 3696:1995 →
0.2
Easy
15
GOST 4461-1977 929 refs · Score 0.2 Compare with GB/T 1.1-2020 →
0.2
Easy
16
GB/T 1.1-2020 923 refs · Score 0.2 Compare with GOST 4461-1977 →
0.2
Easy
17
GB 4208-2008 889 refs · Score 0.2 Compare with IEC 60601-1:2005 →
0.2
Easy
18
IEC 60601-1:2005 885 refs · Score 0.2 Compare with GB 4208-2008 →
0.2
Easy
19
GOST 166-1989 841 refs · Score 0.2 Compare with ISO 7-1 →
0.2
Easy
20
ISO 7-1 786 refs · Score 0.2 Compare with GOST 166-1989 →
0.2
Easy
21
GOST 9147-1980 765 refs · Score 0.2 Compare with ISO 5725-1:1994 →
0.2
Easy
22
ISO 5725-1:1994 754 refs · Score 0.2 Compare with GOST 9147-1980 →
0.2
Easy
23
GOST 3760-1979 730 refs · Score 0.1 Compare with GOST 2789-1973 →
0.1
Easy
24
GOST 2789-1973 719 refs · Score 0.1 Compare with GOST 3760-1979 →
0.1
Easy
25
ISO/IEC GUIDE 98-3:2008 478 refs · Score 0.1 Compare with GOST 2789-1973 →
0.1
Easy