NON-FUNCTIONAL PROPERTIES IN SOFTWARE PRODUCT LINES: A FRAMEWORK FOR DEVELOPING QUALITY-CENTRIC SOFTWARE PRODUCTS May Mahdi Noorian

Content  Background  Motivation  Research Objectives  Approach Overviews  Conclusion 2 Mercedes-Benz Product Line

Background  Software Product Line  Systematic reuse based development approach.  Commonalities and variabilities.  Developing families of software systems.  Consists of two main lifecycles: Domain engineering Application engineering 3

Background 4 Software product line based on FORM method.

Background  Feature Models  The main artefact of domain analysis.  Variability model.  Features are organized through a set of constraints. Structural constraints (Mandatory, Optional, Alternative, OR) Integrity constraints (Include, Exclude)  Feature Model Configuration  In application engineering, the process of selecting the desirable set of features from the feature model is called configuration process.  Configuration process depend on: feature model constraints, and users’ requirements. 5

Background 6

 Goal Models  Provide a framework for capturing and managing early stage system requirements.  Intentional variability.  It generally built over three important concepts: Goals (a desired result for system under development that stakeholders plan to achieve), Softgoals (refer to non-functional properties of system), Tasks (tasks are the methods that can operationalize goals). 7

Background 8

Content  Background  Motivation  Research Objectives  Approach Overviews  Conclusion 9 Mercedes-Benz Product Line

Motivation  Feature models are widely accepted as one of the important tools for domain modeling.  Mostly capture functional and operational variability of a system.  Non-functional properties of the system alongside with functional properties need to be captured and managed from the early stage of development process.  There is a lack of systematic approaches to deal with non-functional properties within feature models. 10

Motivation  Software product line configuration is an important step in application engineering.  selection of desirable set of features is very difficult task for the users and product designers. Complexity of the variabilities represented by feature models. Size of feature model configuration space.  The feature selection depends on the restrictions placed by users’ requirements (functional and non-functional), preferences and feature model constraints.  There is a lack of methods or processes that can help to identify the set of desirable features to fulfill the users’ needs. 11

Content  Background  Motivation  Research Objectives  Approach Overviews  Conclusion 12 Mercedes-Benz Product Line

Research Objectives  Quality-centric Feature Modeling  Addressing non-functional properties from the early stage of software product lines.  Connecting intentional variability models such as goal models with feature variability models in a target domain.  Quality-centric Feature Model Configuration  Developing optimized software products with respect to users’ objectives (functional and non-functional) and preferences. 13

Content  Background  Motivation  Research Objectives  Approach Overviews  Conclusion 14 Mercedes-Benz Product Line

Approach Overview 15 Optimized Product User’s Objectives and Preferences Feature Selection User Requirement Analysis Domain Requirement Engineering (Goal Modeling) Application Engineering  Domain Analysis (Feature Modeling) Integration Process Configuration Mapping Domain Engineering Quality-centric Feature Modeling

16 Model Element Enrichment FM & GM Semantic Annotation Mapping Recommendation Building Quality-centric Feature Model Domain Textual Assets Extended FM & GM with Textual Snippets Annotated FM & GM with Ontological Concepts External Ontologies Mapping Links QcFM Control flow Input Output

Quality-centric Feature Modeling 17

Quality-centric Feature Modeling 18

Quality-centric Feature Modeling 19

Quality-centric Feature Modeling 20

Quality-centric Feature Modeling 21

Quality-centric Feature Modeling 22

Quality-centric Feature Modeling 23

Content  Background  Motivation  Research Objectives  Approach Overviews  Conclusion 24 Mercedes-Benz Product Line

Conclusion  A semi-automatic approach to systematically integrate feature models, which represent functional aspects of a domain, and goal models, which represent non- functional properties.  Through this integration, the quality aspects of the domain can be captured from the early stage of SPL development.  An automated configuration process for developing optimized software product with respect to users’ functional properties, non-functional properties, and preferences. 25

Thank you 26

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