1. Who
is
the
enemy
-­‐
us
or
mo/onlessness?
Devopsdays
Aus/n
2013
Dominica
DeGrandis
@dominicad

2. 1.
The
invisible
cost
of
idle
work
2.
Why
100%
capacity
u/liza/on
no
worky
3.
Why
queues
maHer
4.
The
effects
of
WIP
constraints
What
to
do?
@dominicad
What
happens
when
work
sits
idle?

3. Prep
Backlog
VMProvisioning
Doing
Vms
/vips/Storg/DB
Requester
Valida<on
Checklist
• Roadmap
link
• SRCR/Firewall
• ARCH
approved
Priori%ze
Comple<on
criteria
before
moving
to
Doing
• Commit
date
• PROD
ctrl
Approval
Historical
Cycle
/me
provides
ability
to
forecast
commit
dates.
Pink
=
Blocked!
Handoff
Support
What
happens
when
work
sits
idle?

4. Con/ngency
buffers
in
/melines
increase
variability.

5. Longer
Cycle
Time
Age
&
Decay
Context
switching
More
stuff
to
manage
Wai/ng
for
specialists
or
dependent
resources.
Par/ally
completed
work
can
be
very
expensive.

6.
How
do
we
explain
why
slack
/me
is
our
friend?

7. To
Do
(11)
Doing
(24)
Done
Apr
23,
2013
They
don’t
call
it
a
wai/ng
room
for
nothing.

8. To
Do
(11)
Doing
(24)
Done
Apr
23,
2013
Why
100%
capacity
u/liza/on
doesn’t
work
Capacity utilization is the percentage of the
total possible capacity that is actually being
used.
Capacity utilization (%) = actual output
maximum possible

9. To
Do
(11)
Doing
(24)
Done
Apr
23,
2013
Unpredictable
events
cause
high
variability
and
are
especially
vulnerable
to
capacity
overload.
Loading
people
and
resources
to
100%
u/liza/on
blocks
them
and
then
you
have
to
wait
for
them
to
become
available.

10. To
Do
(11)
Done
Apr
23,
2013
Capacity
u/liza/on
increases
queues
exponen/ally.
The
single
most
important
factor
that
affects
queue
size
is
capacity
u/liza/on.
Each
/me
we
halve
the
amount
of
excess
capacity,
we
double
the
average
queue
size.
Number
of
items
in
a
Queue

11. Effects of WIP constraints
Done
ImplementArchitect
Review
ValidatePrep work
Ongoing
work
Project
work
Interrupts
done
Why Queues Matter
WIP limit example – no more than 1 item per person per row + 1 anywhere
on the board that has a low cost of delay.

12. Few
methods
rival
the
CFD
0
20
40
60
80
100
120
On hold
Proposed
Prioritised
Ready for Dev
Dev
Testing
Ready for Release
Released
Implemented
Attribution to Mike Burrows - @asplake
Deployed,
but
never
used

13. To
Do
(11)
Ramp
meters
reduce
accidents
system-­‐wide
by
at
least
30%.
Ramp
meters
provided
a
travel
/mes
savings
of
3
to
16
minutes
Done
Apr
23,
2013
Effects
of
WIP
constraints

14. Effects of WIP constraints
Done
ImplementArchitect
Review
ValidatePrep work
Ongoing
work
Project
work
Interrupts
done
Effects of WIP constraints
WIP limit example – no more than 1 item per person per row + 1 anywhere
on the board that has a low cost of delay.

15. Op/ons
-­‐
forecast
capacity
for
predictable
work
and
increase
capability
to
handle
the
unexpected:
1. Kill
the
zombie
projects
–
limit
#
of
projects
2. Allocate
capacity
for
the
nature
of
the
demand
3. Allocate
x%
of
capacity
for
lower
priority
work
4. Create
aging
reports
to
see
what’s
clogging
pipeline
5. Find
a
regular
cadence
6. Create
policies
for
escala/ons
7. Increase
capability
of
team
w/
skill
overlap
to
build
resilience
What
to
do
to
keep
work
flowing?

16. Design for Visibility on Specializations
TestInvestigate DeliveredCommitted
SysAdmin
Config/Automate
Network/Monitor
Security
DBA
Jason
Chris
Mark
John
Pete
Ops Board
Visibility on types of demand

17. Reinertsen,
Donald.
The
Principles
of
Product
Development
FLOW,
Celeritas
Publishing,
2009.
hHp://www.reinertsenassociates.com/
hHp://blog.laughlin.com/2012/04/24/googles-­‐20-­‐/me-­‐and-­‐crea/ve-­‐
freedom/
hHp://cheezburger.com/2410726144
hHp://ocvarsity.freedomblogging.com/tag/freeway-­‐league-­‐traffic-­‐jam/
hHp://www.wsdot.wa.gov/Traffic/Conges/on/rampmeters/
hHp://benthereandback.com/?aHachment_id=268
credits

18. Who
is
the
enemy
-­‐
us
or
mo/onlessness?
Devopsdays
Aus/n
2013
Dominica
DeGrandis
@dominicad