The document discusses metrics related to flow in a bar context, specifically analyzing lead time, queue time, and throughput for whiskey bottles. It includes calculations to determine average lead times based on given throughput and work-in-progress (WIP) data. Additionally, it suggests ways to reduce lead times and total wait times by examining queue structures and applying a kanban system.

1. Paulo
Caroli
Agile
Coach
pcaroli@thoughtworks.com
Twitter: @paulocaroli
Whiskey,
Sushi
and
Flow

2. Agenda
• Flow
numbers
at
my
bar
• Queue
and
wait
5me
at
a
Japanese
restaurant
• Q&A

3. Flow
numbers
at
my
bar

4. WIP
• The
number
of
bo?les
in
the
bar.
Bo?les
that
have
been
opened,
but
are
not
yet
empty.

5. Lead
5me
• The
5me
between
the
bo?le
is
added
to
the
bar
and
the
bo?le
comes
out
of
the
bar
(empty).

6. Cycle
5me
• The
5me
between
two
successive
empty
bo?les
leaving
the
bar

7. Throughput
• The
rate
at
which
bo?les
are
passing
through
the
bar.

8. Batch
size
• The
size
of
the
bo?les.

9. My
bar…

10. I
was
really
interested
in
measuring
a
whiskey
bo?le
average
lead
5me
in
my
bar...

11. “The
average
number
of
work
items
in
a
stable
system
is
equal
to
their
average
comple5on
rate,
mul5plied
by
their
average
5me
in
the
system.”
John
Li(le,
1961

12. Doing
(Limit)
Done
To
Do
10
5
9
31
18
17
21
4
7
5
1
12
John
Suzy
Paul
Amy
WIP
Lead
Time

13. WIP
=
Throughput
x
Lead
5me

14. Please
help
me
out...

15. 12
bo?les...

16. an
average
of
6
bo?les
per
year…

17. What
is
the
average
lead
5me
for
a
bo?le
of
whiskey?

18. (a)
2
months
(b)
3
months
(c)
6
months
(d)
1
year
(e)
2
years
What
is
the
average
lead
5me
for
a
bo?le
of
whiskey?

19. WIP
=
Throughput
x
Lead
5me

20. WIP
=
Throughput
x
Lead
5me
12
b
=
6
b
/
year
x
Lead
5me

21. WIP
=
Throughput
x
Lead
5me
12
b
=
6
b
/
year
x
Lead
5me
Lead
5me
=
2
years

22. How
to
reduce
lead
5me?

23. Queue
and
wait
5me

24. very
hungry

25. one
temaki

26. more
than
30
minutes

27. very
frustrated

28. “The
total
wait
5me
for
a
given
item
is
the
sum
of
its
queue
5me
plus
its
working
5me.”
Paulo
Caroli,
2013
(at
AgileTrendsSP)

29. Total
Wait
=
Queue
5me
+
Work
5me

30. Different
kind
of
work
items

31. Different
kind
of
work
items
10
minutes
1
minute

32. Acer
a
few
months,
I
went
back
to
the
restaurant
and
took
a
look
at
their
kanban
system.
I
no5ced
that
all
orders
follow
a
single
queue.

33. Single
Queue

34. Please
help
me
out...

35. What
is
the
wait
5me?

36. Single
Queue

37.
Queue
5me
between
30
and
40
minutes
4
large
orders;
1
being
worked
on,
3
in
the
queue;
each
large
order
takes
10
minutes

38.
Work
5me
1
minute
a
small
order
takes
1
minute

39. Total
Wait
=
Queue
5me
(between
30
and
40
minutes)
+
Work
5me
(1
minute)

40. How
to
reduce
total
wait
5me?

41. Two
Queues

42. What
is
the
new
wait
5me
for
my
small
order?
(small
order
takes
priority)

43. Paulo
Caroli
Agile
Coach
pcaroli@thoughtworks.com
Twitter: @paulocaroli
Op;mizingTheFlow.com
@paulocaroli
Thank
you!
Ques;ons?