ABCDEFGHIJKLMNOPQRSTUVWXYZ
1
2
ICE Scores
ICE score is a prioritization method invented by Sean Ellis, famous for helping grow companies such as DropBox and Eventbrite and for coining the term Growth Hacking. ICE scores were originally intended to prioritize growth experiments, but can also be used for regular project ideas.

You calculate the score, per idea, this way:

ICE score = Impact * Confidence * Ease

Impact is an estimate of how much the idea will positively affect the key metric you’re trying to improve.
Ease (of implementation) is an estimation of how much effort and resources will be required to implement this idea. This is typically the inverse of effort (person-week) — lower effort means higher ease.
Confidence indicates how sure we are about Impact, and to some degree also about ease of implementation.
3
The three values are rated on a relative scale of 1–10 so not to over-weigh any of them. Each team can choose what 1–10 means, as long the rating stays consistent. Ultimately the goal is to have your idea bank look like this:
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100