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CO2401 Software Development Lecture 10 Notes
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  • Course
  • Software Development (CO2401)
  • Institution
  • University Of Central Lancashire Preston (UClan)

This document contains comprehensive notes from Lecture 10 of the CO2401 course on Software Development. The lecture focuses on the various purposes and techniques of software testing, emphasizing its role in both verification (ensuring the software is built correctly) and validation (ensuring the ...

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Document information

  • August 22, 2024
  • 4
  • 2023/2024
  • Class notes
  • Muhammad alhassan
  • All classes

Subjects

  • computer science
  • software
  • development
  • university
  • computer
  • 2nd year
  • efficiency
  • lecture
  • cs
  • notes

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  • University of Central Lancashire Preston (UClan)
  • Unknown
  • Software Development (CO2401)
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CO2401: Software Development
Lecture 10
Purposes of Testing
1. Verification and Validation
o Verification: Ensures the software meets specified requirements.

o Validation: Confirms the software meets the customer’s needs.

o Two Main Goals:

 Demonstrating the software meets its requirements.
 Discovering faults or defects that cause the software to
deviate from its specifications.
2. Types of Testing Outcomes
o Successful Test: The system performs as expected under the test
conditions.
o Failure Discovery: The test exposes a defect or undesirable
behaviour.
Traditional Testing in Large Systems
1. Testing Phases
o Unit Testing: Testing individual components or modules.

o Sub-System Testing: Testing integrated components.

o System Testing: Testing the complete system.

o Acceptance Testing: Testing the system in its operational
environment.


2. Verification and Validation in Testing
o Each testing phase contributes to both verification (ensuring the
system is built right) and validation (ensuring the right system is
built).

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