Requirement Patterns
Req. Patterns: PABRE-Man & PABRE-Cft

Outline
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•
•
•

Requirement Reuse
Requirement Pattern Example
PABRE Method
Tools:
...
Req. Patterns: PABRE-Man & PABRE-Cft

REQUIREMENT REUSE

3
Req. Patterns: PABRE-Man & PABRE-Cft

Requirement Reuse
Your
Context

Common problem that
occurs within the domain,
and a ...
Req. Patterns: PABRE-Man & PABRE-Cft

SRP Example: Failure Alerts
Pattern’s Goal: Having system that provides alerts when ...
Req. Patterns: PABRE-Man & PABRE-Cft

SRP Example: Failure Alerts
Requirement Pattern Failure Alerts
Goal: Satisfy the cus...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE METHOD

7
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE Method: Overview (I)
• PABRE: PAttern Based Requirements Elicitation

• Method...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE Method: Overview (II)
Knowledge of the
Reqt. pattern
catalogue

Needs
IT Consu...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE Method: Use
Knowledge of the
Reqt. pattern
catalogue

Needs
IT Consultant

Cus...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE Method: With Tools

11
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Man

12
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Man: Main functionalities
• SRP repository management
 Classification Schemas...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Man: Overview
Selecting
Classification
Schema

Browsing
SRP Catalogue

Browsin...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Man: Editing a SRP (I)
Tabs of the Selected Item in the
Pattern Navigation Tre...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Man: Editing a SRP (II)
Tab of the Selected Item in the
Pattern Navigation Tre...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Proj

17
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Cft: Main Functionalities
• Projects Repository Management
 Projects
 Projec...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Proj: Overview
Creating a new Project
(when Alphabetical List selected)

Optio...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Proj: Editing a project (I)
Tabs of the Selected Item in the
Project Navigatio...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Proj: Editing a project (II)
Current Tab: Project
Requirement Overview

Creati...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Proj: Editing a SRP requirement
Tabs of the Selected Item in the
Project Navig...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Proj: Editing a new requirement
Tabs of the Selected Item in the
Project Navig...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Proj: Prioritizing SRPs
Prioritized
List of SRPs

Browsing
SRP Catalogue

Addi...
Req. Patterns: PABRE-Man & PABRE-Cft

PABRE-Proj: Browsing SRP catalogue
2 Different
Types of
Browsing

Creating a new ass...
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PABRE System - Software Requirement Patterns

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This presentation describes the PABRE tools for the USE, MANAGEMENT AND EVOLUTION OF SOFTWARE REQUIREMENT PATTERNS FOR REQUIREMENTS ENGINEERING ELICITATION.

PABRE framework: http://www.upc.edu/gessi/PABRE/

PABRE system: http://www.upc.edu/gessi/PABRE/Tools.html

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PABRE System - Software Requirement Patterns

  1. 1. Requirement Patterns
  2. 2. Req. Patterns: PABRE-Man & PABRE-Cft Outline • • • • Requirement Reuse Requirement Pattern Example PABRE Method Tools:  PABRE-Man: Requirement Pattern Management  PABRE-Proj: Project Management 2
  3. 3. Req. Patterns: PABRE-Man & PABRE-Cft REQUIREMENT REUSE 3
  4. 4. Req. Patterns: PABRE-Man & PABRE-Cft Requirement Reuse Your Context Common problem that occurs within the domain, and a suggested solution requirements in natural language Reusable Requirements Requirement Patterns (SRPs) Recognize which existing requirements apply to the patterns apply to the particular context Requirements Book PABRE Method ↓ global errors ↑quality of the individual requirements 4
  5. 5. Req. Patterns: PABRE-Man & PABRE-Cft SRP Example: Failure Alerts Pattern’s Goal: Having system that provides alerts when system failures occur. How do their requirements look like? The solution should alert of disks close to their capacity . alert In case of a network or server disk crash the solution should alert immediately. network or server disk crash, alert The system should alert the administrator of the resources (physical or logical) alert close to their capacity close to their capacity. Requirement template The system shall trigger alerts in case of failuresSet failures.  failuresSet : set of possibleFailures o possibleFailures: server crash | disk crash … 5
  6. 6. Req. Patterns: PABRE-Man & PABRE-Cft SRP Example: Failure Alerts Requirement Pattern Failure Alerts Goal: Satisfy the customer need of having a system that provides alerts when system failures occur. Template The system shall trigger an alert in case of failure. Extended Fixed Part multiplicity(Alerts Types) = 0..1 and Parts Constraint multiplicity(Failure Types) = 0..1 Requirement Extended Part Form Homogeneous Alert Types Failure Alerts Template The solution shall trigger %alertsSet% alerts in case of failure Metric Parameter alertsSet alertsSet: Set(AlertType) Fax | Sound …. AlertType: SMS | Mail | Template The system shall trigger alerts in case of %failuresSet% failures Metric Extended Part Parameter Failure Types failuresSet failuresSet: Set(FailureType) crash … FailureType: server crash | disk Template Fixed Part Requirement Form Heterogeneous Failure Alerts The system shall trigger different types of alerts depending on the type of failure. Extended Parts Constraint Multiplicity(Alerts for Failure Types) = 0..* The system shall trigger %alertsSet% alerts in case of %failuresSet% failures. Metric Parameter alertsSet: Set(AlertType) alertsSet AlertType: SMS | Mail | Fax | Sound …. failuresSet failuresSet: Set(FailureType) crash … FailureType: server crash | disk Template Extended Part Alerts for Failure Types 6
  7. 7. Req. Patterns: PABRE-Man & PABRE-Cft PABRE METHOD 7
  8. 8. Req. Patterns: PABRE-Man & PABRE-Cft PABRE Method: Overview (I) • PABRE: PAttern Based Requirements Elicitation • Method to use and update Req. Patterns • Goals:  Requirements Book Generation  Requirements elicitation phase easier: • ↓ time • ↓ errors ↓ cost 8
  9. 9. Req. Patterns: PABRE-Man & PABRE-Cft PABRE Method: Overview (II) Knowledge of the Reqt. pattern catalogue Needs IT Consultant Customer Supplier Supplier Supplier 6 Requirements Elicitation Patterns Exploration Forms Exploration Parts Exploration Requirem. Extraction Requirem. Creation Reqt. Patterns Catalogue Knowledge of previous projects Catalogue Evolution  Call for tenders OTS-based Solution Requirements Book Feedback Repository Requirements Expert 9
  10. 10. Req. Patterns: PABRE-Man & PABRE-Cft PABRE Method: Use Knowledge of the Reqt. pattern catalogue Needs IT Consultant Customer Supplier Supplier Supplier 6 Requirements Elicitation Patterns Exploration Forms Exploration Parts Exploration Requirem. Extraction Requirem. Creation Reqt. Patterns Catalogue Knowledge of previous projects Catalogue Evolution  Call for tenders OTS-based Solution Requirements Book Feedback Repository Requirements Expert 10
  11. 11. Req. Patterns: PABRE-Man & PABRE-Cft PABRE Method: With Tools 11
  12. 12. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Man 12
  13. 13. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Man: Main functionalities • SRP repository management  Classification Schemas  SRPs  Metrics • SRP repository exploration  Browsing SRP catalogue according to different classification schemas • SRP use  Statistics about the use of patterns with the aim to update the SRP catalogue • SRP catalogue exportation 13
  14. 14. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Man: Overview Selecting Classification Schema Browsing SRP Catalogue Browsing Metrics Creating a new SRP or Classifier (when U.Compliance selected) Information of the Selected Element (SRP) Information of the Selected Element (Domain Metric) 14
  15. 15. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Man: Editing a SRP (I) Tabs of the Selected Item in the Pattern Navigation Tree (SRP) Pattern Navigation Tree: Browsing Forms, Parts & Parameters of the SRP 15
  16. 16. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Man: Editing a SRP (II) Tab of the Selected Item in the Pattern Navigation Tree (Part) Requirement Text (with Parameters) Table of Parameters 16
  17. 17. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Proj 17
  18. 18. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Cft: Main Functionalities • Projects Repository Management  Projects  Project Requirements: • Created as an instance of a SRP • Created from scratch • Project and SRP Repository Browsing  Browsing of SRP Repository: • By priorization • By classification schema • Requirement Books Generation 18
  19. 19. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Proj: Overview Creating a new Project (when Alphabetical List selected) Options over a Project Information of the Selected Element (Project) 19
  20. 20. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Proj: Editing a project (I) Tabs of the Selected Item in the Project Navigation Tree (Project) Current Tab: Project’s General Information Browsing SRP Catalogue Project Navigation Tree: Browsing Project Requirements Information of the Selected Element (Part) 20
  21. 21. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Proj: Editing a project (II) Current Tab: Project Requirement Overview Creating Requirements (I) Creating Requirements (II) 21
  22. 22. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Proj: Editing a SRP requirement Tabs of the Selected Item in the Project Navigation Tree (Requirement that applies an SRP) Info of the applied SRP Requirement’s Text (with parameters) Giving value to a parameter (Set of Domain) 22
  23. 23. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Proj: Editing a new requirement Tabs of the Selected Item in the Project Navigation Tree (New Requirement) Requirement’s Question & Text completely free 23
  24. 24. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Proj: Prioritizing SRPs Prioritized List of SRPs Browsing SRP Catalogue Adding/Removing the Selected SRP to/from the Prioritized List Information of the Selected SRP Information of the Selected Element (SRP) 24
  25. 25. Req. Patterns: PABRE-Man & PABRE-Cft PABRE-Proj: Browsing SRP catalogue 2 Different Types of Browsing Creating a new associated requirement to this form Creating a new requirement applying this part Creating a new associated requirement to this SRP Window to Apply a Part Creating a new requirement in the classifier of this SRP Going to the next SRP in the prioritized list 25
  26. 26. Comments and Questions

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