Introducing%20%20%20Software%20Product%20Lines%20(SPL)

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Introducing Software Product Lines (SPL)

• Silvio Romero de Lemos Meira Eduardo Santana de
  Almeida
• silvio_at_cesar.org.br
• esa2_at_cin.ufpe.br

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Recent area
2002
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Evolution
1960 subroutines
1970 modules
1980 objects
1990 components
2000 SPL
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Previous Classes
Overview Concepts Steps
Product Lines
Overview Origins Concepts Elements
Component-Based Development
Overview Steps Scoping Elements
Domain Engineering
Overview Success and Failure Factors Myths Inibito
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Software Reuse
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Software Product Line
A software product line is a set of
software-intensive systems sharing a common,
managed set of features that satisfy the specific
needs of a particular market segment or mission
and that are developed from a common set of core
assets in a prescribed way. Paul Clements and
Linda Northrop, 2002
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Essential Factors

• Investment
• Planning
• Direction
• Business Strategy

Management
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Is Product Lines a new approach?

• Small-Grained Reuse
• Single-System Development
  with Reuse
• Component-Based
  Development
• Reconfigurable Architecture
• Release and versions of
  Single Products

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Small-Grained Reuse

• Reuse of pieces of code
• Algorithms, modules, objects, components
• Company Libraries
• Poor documentation
• Ineficient search mechanisms
• Opportunistic reuse
• Software Product Line
• Reuse is planned, comprehensive, and enabled
• Asset base
• Requirements, domain models, architecture, test
  cases.....

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Single-System Development
with Reuse

• Software Product Line
• Assets designed for reuse
• Product line is treated as a whole

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Just Component-Based Development

• Products in product lines are composed of
  components, however
• Product-Line Architecture
• Production Plan
• Technical and Organizational Management

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Others

• Reconfigurable Architecture
• Variability Points
• Release and versions of
  Single Products
• Previous versions

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Organizational Benefits

• To achieve large-scale productivity gains
• To improve time-to-market
• To maintain market presence
• To improve product quality
• To increase customer satisfaction
• To achieve reuse goals
• To enable mass customization

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Product Line asset repository Benefits

• Requirements
• Architecture
• Components
• Modeling and Analysis
• Testing
• Planning

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Essential Activities
Core Asset Development
Product Development
Management
Domain Engineering
Application Engineering
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Core Asset Development
Core Asset Development
Management
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Product Line Scope

• Product Line scope is a description of the
  products, that will constitute the product line
  or that the product line is capable of including
• Fundamental activity Scoping
• Commonality and Variability
• Iterative process

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Core assets

• Core assets are the basis for production of
  products in the product line
• Core assets
• Architecture scope, styles, patterns, and
  frameworks
• Components
• Test plans, Test cases
• Documentation
• Domain models
• Requirements
• Commercial off-the-shelf (COTS) components

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Production Plan

• A production plan describes how the products are
  produced from the core assets reusers guide
• A Set of attached process with the glue
• Production Plan describes
• Tools
• Metrics, Metric Plan

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Product Development
Product Development
Management
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Management

• Critical role in the successful fielding of a
  product line
• Technical
• Core asset development
• Product development
• Organizational
• Training
• Funding
• Risks

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SPL
Cultural
Costs
DE
Rules
CBD
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Questions ?
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References

• Clements, 2002 P. Clements., L. Northrop.,
  Software Product Lines Practices and Patterns,
  Addison-Wesley, 2002.
• SEI, 2000 L. Northrop., SEIs Software Product
  Line Tenets, IEEE Software, July/August, Vol. 19,
  No 04, 2002.

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Software Reuse Environment Discussion
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