Notes for Software Quality Engineering

13 Jul 2018

[ SoftwareEngineering  Testing  ]

Software Quality Engineering

What is software quality?

the process to guarantee that a software product does the right things, but also to guarantee that the product does things right.

Software quality management

Quality Planning

• Software Quality Assurance Plan

  • It is created before any quality assurance activities are carried out.

• Quality Assurance

• QA measures

  • Defect prevention

    • Education and training.

      • Product and domain specific level

      • Software development expertise

      • Knowledge about methodology, technology and tools
      • Development process knowledge

  • Defect reduction

  • Defect containment

• How to handle defects

  • logging and tracking

• Quality Control

  • Software Quality Requirement

  • Functional requirements

  • Non functional requirements

    • reliability, security, performance, usability, availability

• Standards for Software Quality

  • The IEEE 730-2002 Standard

    • Software Quality Assurance Plan
      • Management
      • Organization
      • Tasks
      • Roles
      • Estimated Resources
      • Documentation

    • Software Requirement Specification

    • Software Design Description

    • Verification and validation plans

    • Verification and validation results report.

    • User documentation

    • Software configuration management plan.

    • Reviews

  • ISO/IEC 25010:2011 Standard

When compared with IEEE 730-2002, this standard provides two models of software quality instead of the structure of a Software Quality Plan. The first model contains the aspects related to quality when referring to the use of an application

Verification and Validation

What is verifiaction

• Static
• Dynamic
• Software inspections

Software testing

what is validation

Typical validation activities

Typical verification activities

Verification and validation planning

Software inspections

Automated static analysis

Quality Cost Categories

• P-CMM levels

• Quality Assurance (QA)

  • Quality Assurance (QA) is fault prevention through process design and auditing

  • A quality audit is a structured review of specific quality management activities that help identify lessons learned that could improve performance on current or future projects.

Examples: Templates, checklists, guides

• Quality Control (QC)

  • fault/failure detection through static and/or dynamic testing of artifacts . Examples: Code testing, peer reviews, beta trials

  • Acceptance decisions
  • Rework
  • Process adjustments
  • tools and techniques

  • Pareto analysis:

    • Statistical sampling
    • Six Sigma
    • Quality control charts

Software test plan

• Test Process
• Test Scope
• Test Schedule and Resources

• Roles and Responsibilities

• testing process

  • Component testing
    • Software developer

  • Integration testing

    • independent testing team( Main difficulty is localising errors, Incremental integration testing reduces this problem

  • Top-down testing

  • Bottom-up testing

  • blackbox testing

• equiv. partitions

• structural testing/whitebox testing

  • Path testing

    • Independent path

    • Problems when using FSMs?

    • Problems with FSM states

    • Problems with FSM transitions

    • Steps to create a FSM

    • Applications of FSM

• Power of Markov Chains