TUJUAN PERKULIAHAN
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Memahami pemodelan perancangan dengan pendekatan
terstruktur
AGENDA PERKULIAHAN
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Pemodelan perancangan terstruktur
METODE PEMODELAN PERANCANGAN TERSTRUKTUR
APS
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Functional Design
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Berorientasi pada fungsi
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Structured Design (Constantin & Yourdon, 1979), Step wise
Refinement (Wirth, 1971, 1976), Jackson Structured
FUNCTIONAL DESIGN APPROACHES
APS
• Transform Mapping
- langkah perancangan untuk tipe DFD
transform flow
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Incoming flow : aliran/jalur informasi eksternal masuk ke
sistem untuk ditransformasikan menjadi informasi internal
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Transform center : pusat transformasi di dalam sistem yang
akan mentriger informasi keluar dari system
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Outgoing flow : aliran/jalur informasi internal keluar dari
sistem menjadi informasi eksternal
• Transaction Mapping
- langkah perancangan untuk tipe DFD
transaction flow
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Transaction : data tunggal yang mentriger satu atau beberapa
aliran data
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Transaction center : penghubung antara aliran-aliran data
hasil pentrigeran dengan data trigernya
FUNCTIONAL DESIGN APPROACHES
APS
• Transform Flow
• Transaction Flow
a b c d f g e h incoming flow transform center outgoing flow a c b d e f g h transaction transaction center action pathTRANSFORM MAPPING
APS
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Langkah-langkah Transform Mapping
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Incoming flow : aliran/jalur informasi eksternal masuk ke
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Review dan refine DFD sampai ke level paling bawah
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Tentukan apakah DFD tsb. memiliki karakteristik tipe
transform flow atau transaction flow
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Tentukan batas antara incoming flow, transform center dan
outgoing flow
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Bangun first level factoring
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Bangun second level factoring
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Refine first iteration
TRANSFORM MAPPING
APS
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DFD Level 1
1* Interact with user 2* Configure system 3 Activate /deactivate sytem 4 Display messages and status 5* Process password 6* Monitor sensors configuration information user commands and data Control panel Sensors Control panel display Alarm Telephone line configure request configuration data start stop password valid ID msg. A/D msg. configuration data configuration data sensor status sensor information alarm typetelephone number tones
display information
TRANSFORM MAPPING
APS
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DFD Level 2 : Monitor sensors
6.3* Format for display 6.2* Assess against setup 6.4 Generate alarm signal 6.1 Read sensors 6.5* Dial phone configuration information sensor information sensor status
sensor ID, type configuration data alarm type telephone number tones telephone number alarm data sensor ID, type, location
TRANSFORM MAPPING
APS
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DFD Level 3 : Monitor sensors
1 Read sensors configuration information sensor status 2 Acquire response info 3 Establish alarm conditions 8 Generate pulses to line 4 Select phone number 5 Set up conn. to phone net 9 Generate display 6 Format display 7 Generate alarm signal
sensor ID, type
configuration data sensor information alarm type telephone number tones formated ID, type, location alarm data alarm cond. code, sensor ID, timing information list of numbers telephone number tone ready telephone number sensor ID, type,
TRANSFORM MAPPING
APS
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First level factoring : Monitor sensors
configuration information 8 9 6 7 1 2 3 4 5 Monitor sensors executive
TRANSFORM MAPPING
APS
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Second level factoring : Monitor sensors
Monitor sensors executive Sensor input controller Alarm conditions controller Alarm output controller Format display Generate alarm signal Set up conn. to phone net Generate display Generate pulses to line Establish alarm conditions Select phone number Acquire response info Read sensors
TRANSFORM MAPPING
APS
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Refine first iteration : Monitor sensors
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Incoming controller dihapus :
data input tunggal, cukup sederhana
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Transform controller dihapus dan digabung
dalam satu modul : ada penurunan tingkat kohesifitas
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Format display dan generate display digabung : sederhana
Monitor sensors executive Establish alarm conditions Alarm output controller Produce display Generate alarm signal Set up conn. to phone net Generate pulses to line Acquire response info Read sensors
TRANSACTION MAPPING
APS
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Langkah-langkah Transaction Mapping
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Review dan refine DFD sampai ke level paling bawah
•
Tentukan apakah DFD tsb. memiliki karakteristik tipe
transform flow atau transaction flow
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Tentukan batas antara incoming path/transaction,
transaction center dan action path
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Bangun first level factoring
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Bangun second level factoring
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Refine first iteration
TRANSACTION MAPPING
APS
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Transaction Structuring
r s a b d p q Transaction control b a d c1 q r s p Dispatcher Reception pathTRANSACTION MAPPING
APS
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DFD Level 2 : User Interaction
3 Read password 2 Invoke command processing 4 Compare password w/ file 1 Read user command configuration information 5 Activate/d eactivate system 6 Display message & status 7 Read system data 8 Build configurat ion file command type start stop user commands and data configure request password raw configuration data configuration data A/D msg. configuration data configuration data
four digits display
information valid ID msg.
TRANSACTION MAPPING
APS
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First / Second level factoring: User Interaction
User interaction executive Read user command System configuration controller Invoke command processing Activate /deactivate system Password processing controller
Read system data Build
configuration file Read password
Compare password w/ file Display messages & status
TRANSACTION MAPPING
APS
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Arsitektur SafeHome Security Software
User interaction executive Read user command System configuration controller Invoke command processing Activate /deactivate system Password processing controller
Read system data Build
configuration file Read password
Compare password w/ file Display messages & status SafeHome Security Monitor sensors executive Establish alarm conditions Alarm output controller Produce display Generate alarm signal Set up conn. to phone net Generate pulses to line Acquire response info Read sensors
