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JUST STOP ASKING
«WHEN?»
it is the time to stop the slavery
krivitsky@scrumguides.com
@alexeykri
I’m one of the scrum guides
… when I am not coaching
BUSINESS HAS
ITS WANTS
WE ESTIMATE
WE FAIL MAKING
PROMISES
BUSINESS STARTS
TO PUSH
THE VICIOUS CICLE
BUSINESS HAS
ITS WANTS
WE ESTIMATE
WE FAIL MAKING
PROMISES
BUSINESS STARTS
TO PUSH
UNDER PRESSURE
WE ESTIMATE WORSE
WE FAIL AGAIN
BUSINESS PUSHES
HARDER
A TYPICAL PROJECT …
#NOESTIMATES
we should have
multiplied by 2x….
Denver Intl. Airport
Denver Intl. Airport
Eurofighter Typhoon
Eurofighter Typhoon
Sydney Opera House
Sydney Opera House
*CHAOSREPORT от Standish Group
Statistically a software
development project will take
x2.0 MONEY
x1.6 TIME
we’re good a solving
simple tasks!
Stop asking WHEN?
1. BOTH ITEMS COST $1,10
2. THE BAT IS ONE DOLLAR MORE EXPENSIVE
HOW MUCH DOES THE BALL COST?
we’re good a solving
simple tasks…
NOT!
Stop asking WHEN?
Stop asking WHEN?
Stop asking WHEN?
Stop asking WHEN?
Stop asking WHEN?
The “software”
of our brain is buggy.
Stop asking WHEN?
Stop asking WHEN?
DON’T READ THIS TEXT
AND DON’T CALCULATE
3x3 = ?
Stop asking WHEN?
Stop asking WHEN?
Stop asking WHEN?
WATER
SO_P
SHOWER
SALAD
SO_P
SPAGHETTI
WATER
SOAP
SHOWER
SALAD
SOUP
SPAGHETTI
3x3 =
THIS IS DONE BY YOUR «RABBIT»
abc def
“How much time will
this feature take?”
2 days
“How much time will
this feature take?”
How much time do
I have?
2 days
“How much time will
this feature take?”
How much time do
I have?
How do I feel
about it?
2 days
“How much time will
this feature take?”
How much time do
I have?
How do I feel
about it?
How good is the
spec?
2 days
“How much time will
this feature take?”
How much time do
I have?
How do I feel
about it?
How good is the
spec?How much time will
they allow me?
2 days
JUMPING
TOCONCLUSIONS
SOMETIMES FAST DECISIONS ARE GOOD
THE RABBIT IS ALSO GOOD AT
HOW MUCH IS 17x38 ?
Stop asking WHEN?
WHAT KILLED THE ROMAN EMPIRE?
MCMLXXXIV
good food:)
WHAT KILLED THE ROMAN EMPIRE?
“INTUITION”
fast decisions
low energy consumption huge energy consumption
RABBIT vs. TURTLE
“LOGIC”
complex stuff
RABBIT vs. TURTLE 2
WHEN YOU’RE ESTIMATING
WHICH SYSTEM IS ENGAGED?
How old was
Mahatma Gandhi
when he died?
2. How old was he
when he died?
1a. Was Gandhi less than 100
years old when he died?
1b. Was Gandhi less more than
60 years old when he died?
1a. Was Gandhi less than 100
years old when he died?
1b. Was Gandhi less more than
60 years old when he died?
83
average
68
average
MEET LUCY.
SHE IS SHOCKED.
Stop asking WHEN?
LUCY.
SHOCKED.
BUTEVENIFYOUR
LAZYTURTLEWOKE
UP….
THE LAWS OF NATURE
WORK AGAINST YOU
Stop asking WHEN?
Stop asking WHEN?
Stop asking WHEN?
Delays get
accumulated
Delays get
accumulated
Delays get
accumulated
Delays get
accumulated
Early completion
gets lost
Delays get
accumulated
Eliyahu M. Goldratt – suggested buffers
Stop asking WHEN?
time
probability
1
THE ESTIMATES WE ARTICULATE ARE
THE EARLIEST PROBABLE TIME
Stop asking WHEN?
Stop asking WHEN?
Stop asking WHEN?
KRIVITSKY’s zapadLAW
IT IS SO MUCH EASIER TO BE LATE
THAN TO COME EARLIER
Stop asking WHEN?
Stop asking WHEN?
Stop asking WHEN?
BUT THE CORE PROBLEM IS NOT IN
ESTIMATIONS AND THEIR INNACURACY
RANDOMNESS
Stop asking WHEN?
Stop asking WHEN?
Stop asking WHEN?
Stop asking WHEN?
Stop asking WHEN?
DEADLINE
(over there)YOU RELEASE
* procrastination is [TBD]
Stop asking WHEN?
YOU
42
SOMEONE CRAZY
242
12
142
SOMEONE BRAVE
SOMEONE ELSE
83
average
68
average
1. Was Gandhi less than 100
years old when he died?
1. Was Gandhi less more than
60 years old when he died?
AVERAGE FOR ALL is 76
THE RIGHT ANSWER is 78 !
Stop asking WHEN?
Stop asking WHEN?
as a user blah…
given when then foo…
YOU’RE
KIDDING
S
M
L
MORE
GROOMING
2
5
2
1
8
3
2
5
5
2
3
2
Σ
sprints3
2
Stop asking WHEN?
2
5
2
1
8
3
2
5
5
2
3
2
sprints
3
2
2
5
2
1
8
3
2
5
5
2
3
2
YOUR VELOCITY
sprints
3
2
2
5
2
1
8
3
2
5
5
2
3
2
sprints
3
2
YOUR VELOCITY
Stop asking WHEN?
2
5
2
1
8
3
2
5
5
2
3
2
sprints
3
2
спринты
PROBLEM of
ESTIMATIONS ?
спринты
This is REALITY.
and POSSIBILITIES.
Stop asking WHEN?
forget all slides above…
forget all slides above…
and remember
3 advices
STOP FOCUSING ON ESTIMATIONS
AND ACCURACY
(as they will always suck)
#1
#2
START HAVING DISCUSSIONS AROUND
YOUR CAPACITY
AND SCOPE
#3 (in parallel)
CONTINUOUSLY FOCUS ON
IMPROVING YOUR CAPACITY
AND
MINIMIZING THE WORK TO BE DONE
JUST STOP ASKING
«WHEN?»
it is the time to stop the slavery
krivitsky@scrumguides.com
@alexeykri

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Stop asking WHEN?