?"dsD
!9
?"dsD
!9
5
5
?
?
D
D
y
y
°
°
3ps
3ps
3ps
3ps
z è?#è?¥) ?
^è?#è?¥) ?
^
??
??
z A?1:
cA?1:
c
z èV?èV?
z è?3?V?è?3?V?
*
°
?
[
V
1
?
I
?
a
?
?
?
3ps
3ps
"ds
"ds
z s¨
s¨
z 3ps3ps
z Z4C`
z
í
???1
z àQ??1
z "ds"ds
z àQ?1àQ?1
z
? ?
? ? *
*"d¥
? ?
"d¥
? ?
"ds
"ds
z Model
z a pictorial representation of reality.
z
? ?
? ?
zd/
?¥
í
?d/
?¥
í
?
z what a system is and
z What a system does.
zt ??
t ??
z/
??
í
?/
??
í
?
z how the system is composited
z How the system is implemented
"ds
"ds
z
? ?¥×1?
? ?¥×1?
zh"ênh"ên /33
z???B???B
zF<D¨?YF<D¨?Y
z
? ? ?
? ? ?
zV??V??
z
? ?
? ?
z`?`?
.dZE
2? +?y?
?_`ZE
"ds
"ds
—.dZE
.dZE
z"-
P¨¥.dZE
"-
P¨¥.dZE
z2?ZE2?ZE
z?y?ZE?y?ZE
z2?ZE2?ZE +?y?ZE?y?ZE
z?1¥?
?1¥?
z
?
@?m) ?
í
?
?
@?l
? í
í
?
@?m) ?
í
?
?
@?l
? í
í
?l?
?l?
zê?m?1? ??
? ?ê?m?1? ??
? ?
"ds
"ds
—.dZE
.dZE
z
?
@?m
^2?s¥×?9
^"
?
@?m
^2?s¥×?9
^"
d v?¥×1$ b
d v?¥×1$ b
z訥
?
@?myZ
Tμ
?
訥
?
@?myZ
Tμ
?
z?
a/sé?
a/sé (Top-down Partitioning)
z??Wa???Wa? (Middle-Out)
"ds
"ds
—.dZE
.dZE
z
?
@?my
?
@?my
z V3ps-2TV3ps-2T (
@?m#) ?
í
? a ?mD
?
@?m#) ?
í
? a ?mD
?
M?
M?
)s?
?
@?m
s?
?
@?m
z ??
L8 V?
?μ<
@?m?-??
L8¤?9ü
^s??
L8 V?
?μ<
@?m?-??
L8¤?9ü
^s
9
??
HD"dμo?1"-??
L8 b9
??
HD"dμo?1"-??
L8 b
z s) ? V?
?μ<
@?m
¥) ?¤?
??) ?¥μs) ? V?
?μ<
@?m
¥) ?¤?
??) ?¥μ
{?D
{ì
T
{?D
{ì
T (Input and Output Form) asb?"d?
T
my?T bT
my?T b
z s
? i% V?3ps?
L81"mB? ?
aB?s
? i% V?3ps?
L81"mB? ?
aB?
L81"à
Vá
3B?
? i% b
L81"à
Vá
3B?
? i% b
z s
?
@s??
L8 a) ?D
? i%aL V?B_s
?
@s??
L8 a) ?D
? i%aL V?B_
°
?B) ?
?3
? ?1?Z#
{??) bN?
?B) ?°
?B) ?
?3
? ?1?Z#
{??) bN?
?B) ?
?1?1?
?
@ (1
?_ b?1?1?
?
@ (1
?_ b
"ds
"ds
—.dZE
.dZE
z
?
@?m¥á
3
^ü?B ?1×ˉ¥s
?
@?m¥á
3
^ü?B ?1×ˉ¥s
3[¤KaW%
?
@?m bB? ?
3[¤KaW%
?
@?m bB? ?
a??
@?mèíEBQTz31Q
a??
@?mèíEBQTz31Q
ˉ?????t
L¨