Telelogic Tau 3.5

SOMT Methodology Guidelines

Copyright: © 1991 -- 1999 by Telelogic AB. All rights reserved.

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Table of Contents 

1. SOMT Introduction      1

• Background      2
• Overview of the SOMT Method      4
• Scope of the SOMT Method      6
• Requirements Analysis      8
• System Analysis      9
• System Design      10
• Object Design      11
• Implementation      11
• Summary      12
• References      12

2. SOMT Concepts and Notations      15

• Activities, Models and Modules      16
• Implinks and the Paste As Concept      16
• Consistency Checking      18
• Object Model Notation      20
• Class      20
• Relations and Multiplicity      21
• Module      22
• Objects      23
• State Chart Notation      24
• Notation      24
• State Charts in SOMT      27
• Message Sequence Charts      29
• Plain MSC      29
• HMSC      33
• SDL      35
• Structure      36
• Communication      37
• Behavior      37
• Data      39
• Structural Typing Concepts      39
• Graphical and Textual Notation      43
• TTCN      44
• CORBA and IDL      46
• Interfaces      47
• Modules      48
• Other Concepts      49
• ASN.1      50

3. Requirements Analysis      51

• Requirements Analysis Overview      52
• Textual Requirements      54
• Data Dictionary      55
• Use Cases      57
• Textual Use Cases      59
• Message Sequence Charts      60
• Identifying Use Cases      62
• Requirements Object Model      65
• Finding the Objects      65
• Finding Relations      66
• Finding Attributes and Operations      67
• Information Modeling      67
• Context Diagrams      69
• Modeling Behavior      70
• System Operations      70
• Consistency Checks      72
• Summary      73

4. System Analysis      75

• System Analysis Overview      76
• Analysis Object Model      77
• The Logical Architecture of the System      78
• Finding the Objects      79
• Finding Attributes and Operations      84
• Finding Associations      85
• Describing Object Behavior      85
• Architecture of Large Systems      87
• Analysis Use Case Model      89
• Refined Requirements      89
• Behavior Patterns      91
• Textual Analysis Documentation      93
• Requirements Traceability      94
• Consistency Checks      95
• Summary      95

5. From Analysis to Design      97

• From Analysis to Design -- Overview      98
• Analysis vs. Design      99
• Active vs. Passive Objects      101
• Reuse Issues in the Design Models      102
• Mapping Object Models to SDL      103
• CORBA: Design Aspects      104
• Summary      105

6. System Design      107

• System Design Overview      108
• Architecture Definition      111
• Design Module Structure      113
• Deployment Description      116
• Static Interface Definitions Using SDL      117
• Mapping Object Models to SDL Interface Definitions      118
• Design Use Case Model      120
• Usage of MSC      121
• Usage of TTCN      122
• Textual Design Documentation      124
• CORBA: Using IDL in System Design      124
• Static Interface Definition Using IDL      125
• Mapping Object Models to IDL      126
• Consistency Checks      129
• Summary      129

7. Object Design      131

• Object Design Overview      132
• Mapping Object Models to SDL Design Models      134
• Mapping an Active Object      134
• Mapping Active Objects with Inheritance      137
• Mapping Aggregations of Active Objects      137
• Mapping State Charts to SDL Process Graphs      140
• Mapping a Passive Object      141
• Mapping Passive Objects to Signals      153
• Mapping Passive Objects to C      154
• Mapping Passive Objects to ASN.1 Data Types      156
• Mapping Associations      157
• Summary of Mappings from Object Models to SDL      161
• CORBA: Mapping IDL Specifications to SDL Design Models      162
• Describing Object Behavior      164
• The First Version -- Defining the Control Structure      166
• The First Version -- Data Aspects      168
• Elaboration of the Process      169
• Operator Diagrams      170
• Design Testing      171
• Testing Strategy      171
• Test Case Sources      173
• Tools for Testing      174
• Test Practices      175
• Consistency Checks      175
• Summary      175

8. SOMT Implementation      177

• Implementation      178
• Partitioning an SDL System      179
• Adaptation      179
• Integration      181
• C Code Generation      182
• Testing      182
• Summary      183

9. SOMT Projects      185

• SOMT Projects      186
• Project Phases      186
• Multi-User Support      187
• Prestudy/Conceptualization Phase      189
• Requirements Analysis Phase      189
• System Analysis Phase      191
• System Design Phase      191
• Design/Implementation Phase      193
• The Elaboration Phase      194
• Summary      195

Introduction

About this Manual

This volume, SOMT Methodology Guidelines, contains a description of the SOMT method for software development. The SOMT method combines object-oriented analysis with SDL design.

The following activities, with associated models, in the SOMT method are described:

• Requirements Analysis
• System Analysis
• From Analysis to Design
• System Design
• Object Design
• SOMT Implementation

You can also find information on how to organize the activities and models of SOMT into a project.

Documentation Overview

A general description of the Telelogic Tau documentation can be found in Telelogic Tau Documentation.

Typographic Conventions

The typographic conventions that are used in the Telelogic Tau documentation are described in Typographic Conventions.

How to Contact Customer Support

Detailed contact information for Telelogic Customer Support can be found in How to Contact Customer Support.