🏆 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
ISO 3165 548 refs · Score 0.1 Compare with EN 1088:1995 →
0.1
Easy
2
EN 1088:1995 542 refs · Score 0.1 Compare with ISO 3165 →
0.1
Easy
3
EN 292-1:1991 540 refs · Score 0.1 Compare with ISO 13849-1 →
0.1
Easy
4
ISO 13849-1 540 refs · Score 0.1 Compare with EN 292-1:1991 →
0.1
Easy
5
EN ISO 4871:2009 538 refs · Score 0.1 Compare with GOST 12.1.019-1979 →
0.1
Easy
6
GOST 12.1.019-1979 530 refs · Score 0.1 Compare with EN ISO 4871:2009 →
0.1
Easy
7
ISO 14971:2007 528 refs · Score 0.1 Compare with GOST 9.014-1978 →
0.1
Easy
8
GOST 9.014-1978 520 refs · Score 0.1 Compare with ISO 14971:2007 →
0.1
Easy
9
GB/T 13384-2008 517 refs · Score 0.1 Compare with GOST 14192-1977 →
0.1
Easy
10
GOST 14192-1977 509 refs · Score 0.1 Compare with GB/T 13384-2008 →
0.1
Easy
11
GOST 4233-1977 508 refs · Score 0.1 Compare with ISO 9000:2015 →
0.1
Easy
12
ISO 9000:2015 508 refs · Score 0.1 Compare with GOST 4233-1977 →
0.1
Easy
13
EN 982:1996 507 refs · Score 0.1 Compare with EN ISO 3744:2010 →
0.1
Easy
14
EN ISO 3744:2010 505 refs · Score 0.1 Compare with EN 982:1996 →
0.1
Easy
15
GB/T 17626.2-2006 504 refs · Score 0.1 Compare with GB/T 699-1999 →
0.1
Easy
16
GB/T 699-1999 504 refs · Score 0.1 Compare with GB/T 17626.2-2006 →
0.1
Easy
17
GJB 179A-1996 501 refs · Score 0.1 Compare with IEC 60664-1:2007 →
0.1
Easy
18
IEC 60664-1:2007 497 refs · Score 0.1 Compare with GJB 179A-1996 →
0.1
Easy
19
GB 4706.1-2005 481 refs · Score 0.1 Compare with GOST 24104-2001 →
0.1
Easy
20
GOST 24104-2001 477 refs · Score 0.1 Compare with GB 4706.1-2005 →
0.1
Easy
21
GOST 12.4.021-1975 477 refs · Score 0.1 Compare with ISO 8601:2004 →
0.1
Easy
22
ISO 8601:2004 475 refs · Score 0.1 Compare with GOST 12.4.021-1975 →
0.1
Easy
23
GOST 10354-1982 474 refs · Score 0.1 Compare with ISO/IEC GUIDE 99:2007 →
0.1
Easy
24
ISO/IEC GUIDE 99:2007 474 refs · Score 0.1 Compare with GOST 10354-1982 →
0.1
Easy
25
GOST 9.032-1974 473 refs · Score 0.1 Compare with ISO/IEC GUIDE 99:2007 →
0.1
Easy