Transcript Harmony for Systems Engineering

®
IBM Software Group
Achieving Harmony
IBM's Platform and Methodology for Systems Engineering and
Embedded Software Development
© 2007 IBM Corporation
IBM Software Group | Rational software
Agenda
 A Systems Perspective
 Challenges in Systems Engineering
 How Model Based Systems Engineering Helps
 Harmony – A Model-Based Systems Engineering Approach
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Systems Engineering
 Systems engineering
Entire lifecycle
Defines / refines requirements
The holistic view
 Overall architecture
 Interplay between components
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A Systems Perspective
 The systems approach focuses on systems taken as a whole, not on the
parts taken separately.
 It assumes that some properties of systems can only be treated
adequately by taking into account all facets of the system.
These system properties derive from the relationships between the parts of
systems: how the parts interact and fit together.
 A basic assumption of systems engineering is that optimization of
individual components or subsystems will not in general lead to a optimum
system.
 Similarly, individual component behavior cannot be understood without
considering the components’ role and interaction within the system as a
whole.
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Challenges of Systems Engineering (1)
 Increased system complexity
Due to languages, technology, and global information flow capabilities.
 Greater pace of change
Time required to deliver solutions is reduced.
 Systems development has not kept pace with the demands to deliver
more capability in less time
Using traditional methods, development teams often deliver late, or fail to
deliver at all.
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Challenges of Systems Engineering (2)
 Increasingly system failures arises from the interactions among
components .
High levels of interactive complexity is unmanageable using traditional
techniques.
The drive toward tightly coupled systems is fueled by a desire for higher levels
of efficiency and functionality.
Software allows us now to achieve these higher levels of coupling and
interaction that were previously impossible with pure electromechanical devices.
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How Model Based Systems Engineering Helps
 Modeling helps to:
 Manage complexity.
 Simplify and abstract essential aspects of a system.
 Increase understanding.
 Enhance team communication.
 Usable by engineers across multiple disciplines.
 Common language promotes common understanding.
 Reduce risk.
 Model execution increases knowledge and reduces uncertainty and risk.
 Provide traceability.
 Models document what you have done.
 Assess impact of change.
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Benefits of Modeling
 ‘Better’ Systems – identify ‘defects’ earlier.
Models may be verified and validated:
 Statically – checking for consistency.
 Dynamically – execution of models allows identification of missing, conflicting
or overlapping requirements.
 Increased productivity.
Automation of workflows.
Re-use of intellectual property.
 Model Based Systems Engineering leads to a more robust design.
Reduced development time.
Fewer recalls.
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Harmony – A Model Based Systems Engineering
Workflow
 Model-driven hybrid iterative workflow, supporting:
Top-down systems engineering ( Rational HARMONYSE )
Incremental software engineering ( Rational HARMONYESW )
 Seamless transition from systems engineering to software engineering by
using the SysML as paradigm independent modeling language.
(“Same language, different dialects”)
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Integrated system / software development process
“V” Development Lifecycle
System Changes
Stakeholder
Requirements
Requirements
Analysis
Requirements &
Test Scenarios
System Functional
Analysis
Design Synthesis
System Architecture
Baseline
SW
Analysis & Design
Model / Requirements Repository *
Harmony for
Systems
Engineering
System
Acceptance
Harmony for
Embedded RT
Development
(Sub-)System
Integration & Test
Module
Integration & Test
SW Implementation
& Unit Test
* Configuration Controlled Knowledge
of the System Under Development:
• Requirements Documentation
• Requirements Traceability
• Design Documentation
• Test Definitions
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IBM Software Group | Rational software
Integrated system / software development process
Model-driven development of embedded systems
System Changes
Stakeholder
Requirements
Requirements
Analysis
Executable
System Use Case Models
Requirements &
Test Scenarios
System Functional
Analysis
Architectural Analysis Model(s),
System Architecture Model
Design Synthesis
System Architecture
Baseline
Software
Implementation
Model
SW
Analysis & Design
Model / Requirements Repository *
Requirements Models,
System Use Cases Model
Harmony for
Systems
Engineering
System
Acceptance
Harmony for
Embedded RT
Development
(Sub-)System
Integration & Test
Module
Integration & Test
SW Implementation
& Unit Test
* Configuration Controlled Knowledge
of the System Under Development:
• Requirements Documentation
• Requirements Traceability
• Design Documentation
• Test Definitions
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Help every step of the way …
 Every step of the workflow is fully documented
 The Systems Engineering Toolkit automates many otherwise time consuming
tasks
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Customization, Consulting and Best Practices
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Customizable Deployment in RMC/EPF
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®
IBM Software Group
Demonstration
© 2007 IBM Corporation
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Rational Portfolio for Integrated System Delivery
Lifecycle Management for Software and Systems Delivery
Enterprise Architecture/
Architectural Frameworks
Analysis &
Design
Rational System Architect
Rational Rhapsody
Product, Project &
Portfolio Management
Rational Focal Point
Requirements
Definition &
Management
Construction
Rational DOORS
Rational Requirements Composer
Release
Management
Measurement &
Reporting
Configuration &
Change Mgmt
Rational Team Concert
Rational ClearCase
Rational ClearQuest
Rational Synergy
Rational BuildForge
Rational Insight
Team Awareness
Dashboards
Production /
Operations
Quality
ManagementSearch
Security
Eclipse
Rational Rhapsody
Events
and Query
Notification
Rational Quality Manager
Asset
Discovery,
In Context &
Management
Collaboration
Reuse
Rational Asset Manager
Rational Logiscope
Jazz Integration Architecture
Rational Method Composer, Harmony
System Lifecycle Process Management
System
s
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IT
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