C A P A C IT Y
A N A L Y S IS
M E T H O D O L O G Y
R e s o u r c e s
1
c h a ir s
2
①
=
co n s u m p t io n
+
s f .E E
s e t u p
t im e
2
R e s o u rc e s
B I N
N o t e : if
C a p a ci t y
3
#
a v a il a b i l i t y
t h e re
→
=
B o t t l e -n e c k
G en e r a l
m e t h o d
Id e n t i f y
t h e
t o m a n a g e
B I N
A d d it i o n a l :
c a p a ci t y
, E x p l o it
P ro c e ss
of
a
sy s t em
B I N , S u b o r d in a t e
cy c le
t im e
=
( IL S E )
p ro c e s s t o B I N , E l e v a t e
^
in
c a p a ci ty
C a p a ci t y
1 )
K E Y
H o w
m u c h
c a n
S y s t e m
2 ) H o w
m u ch
w e
(T P ) =
c a p a c it y
=
t im e
m a n y
◦ W
IP
re d u c e
4 ) H o w
→
it
t a k e
t im e
( T T )
a re
c u r re n t l y
c u rre n t
W IP
→
e f f i c ie n t l y
→
m á x . t h ro u g h p u t
d o e s
it e m s
T o
m in u t e s
t im e
t o
→
it e m s
↑
L
in
T T
↑ W
↑
=
IP
B I N
c a p a ci t y
d o
u se
o u r
re s o u r c e s ?
h o u rs
p e r
d a y
×
→
8 h is
×
m a c h in e s
h o w
c a n
S
0
C U R
IT U A T I O N
w it h
T h ro u g h p u t =
→
a
re s o u rce
/
re so u rc e
p ro d u ce p e r d oy
8
1 7 ,6
2
lo w e s t
c a p a c it y
B I N
c a p a c it y
E f itut t g io n
=
L I T T L E 'S
LA W
=
-
W p p IP
C a p a ci t y
↑
c a p a ci t y
=
↑
=
3 ,6 3
=
4
=
, 5
0 ,4
W IP =
T T ✗ T P
W IP
T T
T P =
↑
W IP
w o rv in g
C a p it a l
re q u ir e d
,
7 0 %
V E
S
a n d
A - 1
→
Q
D e m
U E U E S
a n d
>
c a p a ci t y
d u rin g
a
t im e
in t e r v a l
( s e a s o n a li t y )
→
1/ 0
( t a c k le w it h c y c l ic a l s t o c k )
c u r v e s
T o t a l w a it i n g t i m e
H o u r s w it h
Q u e u e s
A r e a
A v er a g e
( A )
=
P e n d in g
w a it i n g
A v g . w a it in g
o f d e la y e d
%
A v g . c u s t o m e rs
in
in
✗
t im e
#
#
=
q u e u e
h o u rs
=
→
o
8 3
p a x
4 1, 5 P a n
15 0 p a x
=
A re a
=
d e l a y e d
sh o p
in t e r v a l s iz e
A re a
T o t a l p a x
t im e
c u s t o m e rs
c u s t o m e rs
A r g . q u e u e
p a x
D e la y e d
D e la y e d
cu st .
A re a
Q u e u e h rs .
t o t a l P a x
# h o u rs o p e n
1 / 2 h rs
0 ,2 8
h o u rs
4 1 ,5
9 4
4 1 15
3 ,5
15 0
5 ,5
=
=
h rs
=
=
4 1, 5
p a x / n
A v g . # it e m s
in t h e s y s t e m
2 7 ,2 7
"
×
a : #
A v er a ge
6 2 ,6 %
1 1 ,8 5
(L )
- 0 ,4 4 h r s .
9 4
c u s t o m e rs
T o t a l p a x
=
×
q u e u e
( L q )
A rg . q u eu e (W P )
=
X
T p
p a x =
A re a
T o t a l h o u rs
4 1,5
5 ,5
l
W
F E E T
×
↓
cu s t o m e rs
A v e ra g e
w a it in g
"
= 7 ,5
W
5
8 0 ,6 %
s a le s
◦ u t ili z a t io n
1/
m u ch
2
c u s t o m e rs
=
a t
i n t erb ly
( p e r ch a ir )
8
p ro ce sso r
=
A s s e m b ly
c u st o m e r?
=
p ro d u ce
w e
↑
a
T T
p ro c e s s ?
→
↑ T P
→
s e rv e
¡
)
m a c h in e s
s y s t e m
t h ro u g p u t
p r o c e s s o r c a p a ci t y
T T
p r o d u c tio n /
0 ,5
c a p a ci t y
p ro d u c e ?
ra t e
◦ T h ro u g h p u t
3 ) H o w
=
=
c a p a ci t y
co n c e p t s
◦ T h ro u g h p u t
◦
U t i l iz a t i o n
B I N
→
✗
P r o c e s s o r a v a il a b i li t y
B a t c h co n s u m p t i o n × # b a t c h e s "
(B / N )
s y s te m
→
2
T h ro u g h p u t
se ts / d a y
N o t e :
w h e re
c u t tin g
)
C I T I E S
( p e r ch a ir )
( 4
y c h a ir s / b u t c h
1 b a t c h es
t
O
=
0 ,2
4 c h a ir s / b a t c h
✗ 1 0 b a t c h e s
③
C h a ir s
✗
4 0
q
A r g . w a it i n g
t im e
s
st
co
g
in
er
rd
o
s
st
co
ry
to
en
v
in
2
q
m
a
ig
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e
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o
IP
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ib
le
ss
p
d
d
d
e
d
e
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as
e
n
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S
s
s
le
→
t
or
sh
is
I
L
If
S
S
ss
r
B
s
a
D
d
an
(s
or
xn
)
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st
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le
b
a
t
-
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he
t
in
r
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m
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p
=
h
=
J
=
✓
-
r
.
l
s
o
ry
to
g
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n
ri
n
+
ry
to
n
ve
in
e
h
t
g
in
ld
o
h
of
t
s
co
%
=
b
st
co
ry
a
it
n
u
h
c
t
a
b
i
ve
n
o
ti
ia
v
e
d
rd
a
d
an
t
s
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x
in
ld
ho
f
o
st
co
ry
a
it
n
u
→
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✗
r
V
in
*
9-
→
r
e
rd
o
f
o
cy
en
u
q
re
f
=
f
o
t
o
ro
re
a
u
D
×
g
nd
a
x
Q
u
d
er
v
co
to
t
m
be
w
an
e
w
∀
f
n
u
is
h
t
k
c
e
ch
o
#
w
e
=
↳
s
q
s
t
h
it
w
+
S
i
EO
=
w
er
*
s
2
T
Q
=
D
it
n
u
t
◦
in
o
N
R
◦
a
C
1
@
a
C
te
e
D
M
a
t
a
(
E
✗
✗
a
t
de
r
e
iv
g
em
pr
ro
ot
e
ryf
ve
ad
in
r
or
to
e
d
e
ne
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ys
a
d
#
=
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V
or
d
r
e
p
s
st
co
IX
=
F
=
L
K
t)
n
re
ur
(c
r
e
rd
o
r
e
p
y
it
nt
e
im
t
→
d
n
a
m
e
D
a
Q
u
=
s
S
R
=
a
l
a
iv
rr
a
e
h
t
ty
i
il
b
a
ri
a
v
l
o
tr
n
co
o
n
,
m
o
d
n
a
o
=
1
a
C
→
O
-
D
S
c
ti
is
in
rm
w
o
k
r
a
J
=
a
(
n
o
ti
a
ri
a
v
of
t
n
ie
ic
ff
e
co
=
)
ty
li
bi
a
ri
a
v
es
at
ic
d
in
(
n
o
ti
a
vi
e
d
rd
a
d
n
a
t
s
=
)
e
ut
in
m
/
s
er
m
to
us
(c
te
ra
l
a
iv
rr
a
=
t
=
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im
t
(
e
im
t
l
a
iv
rr
a
r-
te
in
.
g
v
a
=
a
IE
q
a
d
or
N
TO
a
g
ro
→
k
c
o
t
s
y
y
it
il
b
a
ri
a
v
l
a
iv
rr
d
n
t
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d
n
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l
m
t
.
2
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ti
e
f
he
m
de
P
F
×
J
×
Z
=
S
S
p
a
IN
O
s
LT
✗
∅
y
il
=
P
O
R
x
→
in
V
or
er
×
S
ne
U
y
→
il
b
ria
Le
→
a
v
it
il
b
a
ri
va
s
s
le
e
h
-
y
K
S
*
se
a
re
c
in
it
o
ri
n
e
s
on
ti
o
f
le
#
o
ib
ss
t
po
es
w
as
lo
b
sc
as
t
l
a
e
B
a
o
m
9
4×
D
x
Ir
p
H
e
'
+
K
o
ti
h
+
*
↳
s
st
*
V
co
e
↳
ve
D
x
-
as
h
rc
u
P
t
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er
d
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te
p
to
re
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rd
=
o
e
R
la
s
st
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lc
en
h
w
ts
s
o
C
ca
o
T
co
l
a
t
o
t
•
e
eu
qu
↓
=
n
io
t
a
iz
il
ut
↓
→
n
o
ti
a
z
li
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t
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er
v
r
e
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e
u
e
u
Q
↑
=
.
T
e
eu
u
q
↑
=
.
r
l
va
iv
rr
A
↑
S
→
ty
i
il
b
a
ri
a
v
l
a
i
iv
es
u
ue
q
→
e
m
ti
g
in
it
a
w
e
th
ts
c
e
ff
a
ty
il
b
rr
a
ri
A
a
•
↑
→
y
t
i
il
b
a
ri
a
v
e
im
t
e
ic
rv
e
s
•
a
v
a
(t
e
u
e
)
k
c
o
st
ty
fe
sa
h
it
w
le
ck
t
ty
i
il
b
ia
ar
v
h
it
w
t
u
b
y
ci
q
u
p
a
Ca
>
d
an
m
e
D
→
of
pe
y
t
e
th
d
n
a
t
2
#
s
er
d
N
IO
T
A
U
IT
n
U
.
1
S
s
e
eu
u
Q
ic
st
a
h
c
to
S
→
)
ic
st
a
ch
to
(s