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The document provides an overview of requirements engineering for software development. It discusses the importance of requirements specification, different types of requirements (functional, non-functional), and techniques for modeling requirements such as data flow diagrams, entity relationship diagrams, and structured English.

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Requirements Engineering Lecture @LPU
Course Contents ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
High Level Requirements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Understand the client’s business domain ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Understanding Requirements ,[object Object],[object Object],[object Object],[object Object],[object Object]
The statement of requirements or SRS should possess the following properties: ,[object Object],[object Object],[object Object]
Contd…. ,[object Object],[object Object],[object Object]
Functional Requirements ,[object Object],[object Object],[object Object],[object Object]
Non-Functional Requirements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Examples of non-functional requirements ,[object Object],[object Object],[object Object],[object Object],[object Object]
Other Classifications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Other Classifications Contd….. ,[object Object],[object Object]
Satisfiability Requirements
Criticality ,[object Object],[object Object],[object Object],[object Object]
User categories ,[object Object],[object Object]
Modelling Requirements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Structured Systems Analysis and Design Methodology (SSADM) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Data Flow Diagram (DFD) ,[object Object],[object Object],[object Object],[object Object]
Symbols
The notation used in DFD ,[object Object],[object Object]
The notation used in DFD Contd….
The notation used in DFD Contd…. ,[object Object]
The notation used in DFD Contd…. ,[object Object]
Getting started: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Points to remember ,[object Object],[object Object],[object Object],[object Object]
Points to remember Contd….. ,[object Object]
Points to remember Contd….. ,[object Object]
Points to remember Contd….. ,[object Object],[object Object],[object Object]
Entity Relationship Diagram (ERD ) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ERD Components ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Types of Entities ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Attributes ,[object Object],[object Object],[object Object]
Relationships ,[object Object],[object Object],[object Object],[object Object]
Relationships Contd….. ,[object Object],[object Object],[object Object],[object Object],[object Object]
ERD Notation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Purchase Order
Example for Peter Chen notation ,[object Object],[object Object]
ER diagrams using Bachman notation ,[object Object],[object Object],[object Object]
ER diagrams using Bachman notation ,[object Object],[object Object]
Data Dictionary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Data Dictionary Contd… ,[object Object],[object Object],[object Object],[object Object]
Data Dictionary Contd…. ,[object Object],[object Object],[object Object],[object Object]
Data Dictionary Contd…. ,[object Object],[object Object]
Data Dictionary Symbol’s & Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Decision Tree and Decision Tables ,[object Object],[object Object],[object Object],[object Object],[object Object]
Decision Tables ,[object Object],[object Object],[object Object],[object Object]
BINARY-VALUED DECISION TABLE Domestic Customer Y Y N N Consumtion < 300 units per month Y N Y N Minimum rate Y N N N Special rate N Y N N Double minimum rate N N Y N Double special rate N N N Y
MULTI-VALUED DECISION TABLE Customer D D N N utilization ≥ 300 <300 ≥ 300 <300 Rate S M 2S 2M
Structure English ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Structure English Contd… ,[object Object]
State Transition Diagram ,[object Object],[object Object],[object Object],[object Object]
State Transition Diagram Contd….
Conclusion ,[object Object],[object Object],[object Object],[object Object]
[object Object]

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