This document discusses using silent grouping to size user stories compared to planning poker. It finds that silent grouping takes significantly less time per user story, with average times of 0.2 minutes for silent grouping versus 37 minutes for planning poker. When estimating the time savings for sizing hundreds of user stories across multiple projects, silent grouping could save over 190 hours and $134,000 in costs compared to planning poker. Overall, the document shows that silent grouping provides a much faster and more efficient approach for sizing large numbers of user stories.
3. The
Goals
of
Each
Part
of
Silent
Grouping
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4. 1
2
3
5
8
13
21
34
Do something cool Do something cool Do something cool
Do something cool Do something cool
Do something cool
As a As a As a
User
Do something cool User User As a As a
Do something cool As a I want to I want to I want to User User
User do something cool with the do something cool with the I want to I want to
do something cool with the
As a I want to product product product do something cool with the do something cool with the
User As a do something cool with the So that I can product product
So that I can So that I can
I want to User product benefit in some way benefit in some way So that I can So that I can
I want to benefit in some way
do something cool with the benefit in some way benefit in some way
So that I can
product do something cool with the benefit in some way
product
So that I can
benefit in some way So that I can
benefit in some way
Do something cool Do something cool Do something cool
Do something cool
Do something cool
As a As a As a
User
Do something cool User User As a
Do something cool As a I want to I want to I want to User
User do something cool with the do something cool with the I want to
do something cool with the
As a I want to product product product do something cool with the
User As a do something cool with the So that I can product
So that I can So that I can
I want to User product benefit in some way benefit in some way So that I can
I want to benefit in some way
do something cool with the benefit in some way
So that I can
product do something cool with the benefit in some way
product
So that I can
benefit in some way So that I can
benefit in some way
Do something cool
Do something cool Do something cool Do something cool
As a Do something cool
User Do something cool
I want to As a As a As a
User User As a
do something cool with the I want to
User
product I want to I want to User
As a
User do something cool with the do something cool with the I want to
So that I can do something cool with the
benefit in some way I want to product product product do something cool with the
do something cool with the So that I can product
So that I can So that I can
product benefit in some way benefit in some way benefit in some way So that I can
benefit in some way
So that I can
benefit in some way
Do something cool
Do something cool Do something cool Do something cool
As a
User Do something cool
I want to As a As a As a
User User
do something cool with the I want to
User
product As a I want to I want to
User do something cool with the do something cool with the do something cool with the
So that I can product
benefit in some way I want to product product
do something cool with the So that I can So that I can So that I can
product benefit in some way benefit in some way benefit in some way
So that I can
benefit in some way
Do something cool Do something cool Do something cool
As a As a As a
User User User
I want to I want to I want to
do something cool with the do something cool with the do something cool with the
product product product
So that I can So that I can So that I can
benefit in some way benefit in some way benefit in some way
Do something cool Do something cool Do something cool
As a As a As a
User User User
I want to I want to I want to
do something cool with the do something cool with the do something cool with the
product product product
So that I can So that I can So that I can
benefit in some way benefit in some way benefit in some way
Do something cool Do something cool
As a As a
User User
I want to I want to
do something cool with the do something cool with the
product product
So that I can So that I can
benefit in some way benefit in some way
Do something cool
As a
User
I want to
do something cool with the
product
So that I can
benefit in some way
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5. Average
Time
to
Size
a
User
Story
50
45
40
Time
(minutes)
35
30
25
20
15
10
5
0
P1
F1
U1
C1
P1
F1
U1
C1
Silent
Grouping
0.2
0.4
0.3
0.1
Planning
Poker
37
36
45
0
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6. Using
Planning
Poker
and
Silent
Grouping
160
140
Number
of
User
Stories
120
100
80
60
40
20
0
P1
F1
U1
C1
User
Stories
Sized
with
Silent
70
82
42
150
Sizing
User
Stories
Sized
with
10
20
4
0
Planning
Poker
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7. Number
of
User
Stories
Per
Product
160
140
120
Number
of
User
Stories
100
80
60
40
20
0
P1
F1
U1
C1
Number
of
User
Stories
Per
80
102
46
150
Product
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8.
9. Average
EsAmated
EsAmated
EsAmated
Average
Time
Per
Time
Time
if
Time
Total
Total
Time
Per
User
Story
Saving
Planning
Saving
EsAmated
EsAmated
User
Story
using
using
Poker
using
Person-‐ Person-‐
Planning
Silent
Silent
were
used
Silent
Hour
Day
Poker
Sizing
Sizing
for
all
Sizing
Savings
Savings
Product
(minutes)
(minutes)
(minutes)
(hours)
(hours)
(Hours)
(Days)
P1
37
0.2
2575.0
49.3
42.9
515.0
68.7
F1
36
0.4
2917.0
61.2
48.6
437.6
58.3
U1
45
0.3
1877.5
34.5
31.3
563.3
75.1
C1
N/A
0.1
4408.0
73.8
73.5
1175.5
156.7
Totals
0.2
11777.5
218.8
196.3
2691.3
358.8
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10. Total
Total
Number
Time
using
Total
EsAmated
Number
of
Sized
using
Planning
Number
Time
Saving
User
Planning
Poker
sized
Using
using
Silent
HypotheAcal
Product
Stories
Poker
(minutes)
Silent
Sizing
Sizing
(hours)
Cost
Savings
($)
P1
80
10
370
70
42.9
25,750.00
F1
102
20
720
82
48.6
21,877.50
U1
46
4
180
42
31.3
28,162.50
C1
150
0
0
150
73.5
58,773.33
Totals
378
34
1270
344
196.3
134,563.33
@ken_power