Lecuture 6 System Modelling

Lecuture 6 System Modelling - SystemModelling TeresaXiaCai...

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CUHK, Spring 2007 System Modelling System Modelling Teresa Teresa  Xia Cai  Xia Cai
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CUHK, Spring 2007 Software Engineering / 4A - 2 The software life cycle The requirements engineering process Where is system modelling in  Where is system modelling in  Software Engineering lifecycle? Software Engineering lifecycle?
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CUHK, Spring 2007 Software Engineering / 4A - 3 What is system modelling? What is system modelling? Abstract descriptions of systems whose  requirements are being analysed To help the analyst to understand the  functionality of the system Used to communicate with customers
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CUHK, Spring 2007 Software Engineering / 4A - 4 System models System models Software system External Structural Behavioural Context models Data models Object models Different models present the system from  different perspectives Behavioural models
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CUHK, Spring 2007 Software Engineering / 4A - 5 Outline Outline Context models Behavioural models Data models Object models
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CUHK, Spring 2007 Software Engineering / 4A - 6 1. Context models 1. Context models To illustrate the operational context of a system To show what lies outside the system  boundaries. Specified by: Architectural models  - the system and its relationship  with other systems Process models  - the overall process and the  processes that are supported by the system
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CUHK, Spring 2007 Software Engineering / 4A - 7 The  The  architectural model architectural model : :  an ATM system  an ATM system Auto-teller system Security system Maintenance system Account database Usage database Branch accounting system Branch counter system Sub-systems Relationships between systems
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CUHK, Spring 2007 Software Engineering / 4A - 8 The  The  process model process model e e quipment procurement quipment procurement
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CUHK, Spring 2007 Software Engineering / 4A - 9 2. Behavioural models 2. Behavioural models To describe the overall behaviour of a system. Two types:
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Lecuture 6 System Modelling - SystemModelling TeresaXiaCai...

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