This document discusses various architectural styles including data-centered, data-flow, call and return, layered, and client-server architectures. It explains how to map a data flow diagram (DFD) showing transform or transaction flows to a call and return architecture. Examples are provided of mapping transform and transaction flows from DFDs to the corresponding call and return architecture. Homework tasks are assigned to map DFDs for course registration and temperature monitoring systems to a call and return architecture.

1. Architectural Design
Deciding on the right Architectural Style
Mapping the DFD to a suitable Architecture
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2. Architectural Design
Different Architectural Style
Data-Centered Architecture
Data-Flow Architecture ( Pipes and Filters )
Data-Flow Architecture ( Batch Sequential )
Call and Return Architecture
Layered Architecture ( OS Type )
Layered Architecture ( Protocol Layer Type )
Client Server Architecture
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3. Architectural Design
Data-Centered Architecture
Client Client
Software Software
Client Client
Software Software
Data Store
(Repository)
Client Client
Software Software
Client Client
Software Software
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4. Architectural Design
Data-Flow Architecture ( Pipes and Filters )
Filter
Filter
Filter Filter Filter
Filter
Filter
Pipes
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5. Architectural Design
Data-Flow Architecture ( Batch Sequential )
Filter Filter Filter Filter
Pipes
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6. Architectural Design
Call and Return Architecture
M
(Main Program)
Fan-out
Depth a b c
d e f g h i
Fan-in
j k l
Width
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7. Architectural Design
Layered Architecture ( OS Type )
User Interface
Layer
Application Components
Layer
Utility
Layer
Core
Layer
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8. Architectural Design
Layered Architecture ( Protocol Layer Type )
Layer 7
Layer 6
Layer 5
Layer 4
Layer 3
Layer 2
Layer 1
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9. Architectural Design
Client-Server Architecture
Communication
Client Medium Server
Software (Protocol H/W Software
And S/W)
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10. Architectural Design
Which Architecture to choose? Design Dimension
Reliability
The answer lies in computing the Performance
Design Dimensions for each of Security
the Architecture Style and Maintainability
choosing that Architecture which Flexibility
scores the most. Testability
Portability
Re-usability
Inter-operability
Dependability
Efficiency
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11. Architectural Design
Mapping DFD to Call and Return Architecture
Any DFD has two kind of flow present, Transform Flow and
Transaction Flow
Identify the portion of the diagram which has a ‘Transform Flow’
characteristics or ‘Transaction Flow’ characteristics.
If necessary blow-up the DFD into further detail level ( 2,3 etc. ).
Apply ‘Transform Mapping’ and/or ‘Transaction Mapping’ to get the
desired Call and Return Architecture.
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12. Architectural Design
Example of an DFD showing Transform Flow
Incoming Flow
Boundary
d f
a b c
e g
Transform
Center
Outgoing Flow
Boundary
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13. Architectural Design
Mapping Transform Flow to Call and Return Architecture
Overall
Transform
Executive
Input Transform Output
Controller Controller Controller
b c e d
a g f
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14. Architectural Design
Example of an DFD showing Transaction Flow
Action Path e f g
Boundary
d
Action Path
Reception Path
Boundary h i
a b c
j k
Reception
Path
l
Transaction m
Center
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15. Architectural Design
Mapping Transaction Flow to Call and Return Architecture
Overall
Transaction
Executive
Action Branch
Reception Branch
c
b
d
l j h
Controller
Executive
a m k i e f g
d
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16. Architectural Design
HOME TASK
1. For the problem, “Course Registration System”; map the DFD to the
‘Call and Return’ architecture
2. For the problem, “Temperature Monitoring System”; map the DFD
to the ‘Call and Return’ architecture.
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