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Transcript of SQA Lecture 1
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SOFTWARE QUALITY ENGINEERING
LECTURE # 1
INTRODUCTION
Engr. Ali Javed5 th September, 2012
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Instructor Information2
Course Instructor: Engr. Ali JavedAssistant ProfessorDepartment of Software Engineering
U.E.T TaxilaEmail:[email protected]: http://web.uettaxila.edu.pk/uet/UETsub/perSites/[email protected] No: +92-51-9047747Office hours:
Monday, 09:00 - 11:00, Office # 7 S.E.D
Lab Instructors: Engr. Anum & Engr. Kanwal
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Course Information3
Course Name: Software Quality Engineering
Course Code: SE-301
CMS Link:http://web.uettaxila.edu.pk/CMS/AUT2012/seSQEbs/
Engr. Ali Javed
http://web.uettaxila.edu.pk/CMS/AUT2012/seSQEbs/http://web.uettaxila.edu.pk/CMS/AUT2012/seSQEbs/http://web.uettaxila.edu.pk/CMS/AUT2012/seSQEbs/http://web.uettaxila.edu.pk/CMS/AUT2012/seSQEbs/ -
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Reference Books
Software Quality Engineering: Testing, Quality Assurance, andQuantifiable Improvement: JEFF TIAN, 2005.
Software Testing & Continuous quality improvement 2nd
Editionby William Lewis.
The Art of Software Testing: Glenford Myers, 2 nd Edition
Software Testing and Quality Assurance, Theory and Practice:KSHIRASAGAR NAIK, PRIYADARSHI TRIPATHY, 2008.
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Grading Criteria
GradingMid Term - 20%
End Term - 40%Quiz - 10 %Assignment - 10 %Lab Sessions - 20 %
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Quizzes and Assignments
Quiz- 4 quizzes
2 before mid term2 after mid term
Assignment- 4 assignments
2 before mid term2 after mid term
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Quality
Quality Engineering
Quality Types
Quality Control vs Quality Assurance
Different views of Quality
Quality Models
Cost of Quality
Software Quality8
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Different Views of Quality
Transcendental ViewUser ViewManufacturing ViewProduct ViewValue based View
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Quality Models
Standard quality models
McCall
ISO/IEC 9126
IEEE
Application or company specific quality models
FURPS
GQM Approach
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Cost of Quality
Prevention cost:
Appraisal cost:
Failure cost:
Internal failure costExternal failure cost
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Quality Assurance Classification Scheme for Quality Assurance
Dealing with Pre- Post Release Defects
Defect prevention
Defect Reduction Defect Containment
Quality Assurance12
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Classification scheme for QA
Defect PreventionEducation and trainingProcess conformance and standards enforcementTools/technologies and techniques
Defect Reduction (Defect Detection and Removal)Static TestingDynamic Testing
Defect ContainmentSoftware Fault ToleranceFault Containment
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Software Quality AssuranceSQA Team
SQA Plan
Software Review
Formal Technical ReviewsReview Guidelines
Software Quality Assurance14
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SQA Team15
Testing Manager
Test Team Lead
Test Analyst
Tester
Independent Test Observer
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SQA Plan16
The software quality assurance plan is an outline of quality measures toensure quality levels within a software development effort.
The plan is used to compare the actual levels of quality during developmentwith the planned levels of quality.
If the levels of quality are not within the planned quality levels,management will respond appropriately as documented within the plan.
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Software Reviews17
What is software review?
Why software reviews?
Objectives
Review Meeting Constraints
Review Meeting Results
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Configuration
Software Configuration Management
Baselines
Software Configuration Items
SCM Process
SCM Tasks
Software Configuration Management18
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Software Configuration Management19
Software Configuration Management is the art ofidentifying, organizing and controlling modificationsto the software being built by a programming team. It
maximizes productivity by minimizing mistakes
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Baselines20
IEEE Std. No. 610.12-1990 definesbaselines as,
A specification or product that has beenformally reviewed and agreed upon, thatthereafter serves as the basis for furtherdevelopment, and that can be changed onlythrough formal change control procedures.
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SCI21
The items that comprises all information produced asa part of software process are collectively called asoftware configuration items.
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SCM Tasks22
Identifications of objects
Version Control
Change Control
Configuration Auditing
Status Reporting
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What is Software Testing?
Software Testing ActivitiesSoftware Testing Principles
Test Cases
Basic Types of testing
Methods of Testing
Software Testing23
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Software Testing24
Testing is the process of executing a programor system with the intent of finding errors.
by Myers 1979
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Test Case25
A test case in software engineering is a set ofconditions or variables under which a tester willdetermine whether an application or software
system meets specifications.
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Software Testing Activities26
Test Planning
Test Case Design and Specification
Test Set up
Test Execution
Test Result Analysis and Reporting
Problem/Bug Reporting
Test Management and Measurement
Test Automation
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Methods of Testing27
Manual Testing
Automated Testing
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Types of Testing28
Black Box Testing
White Box Testing
Gray Box Testing
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Introduction of static testingStatic Testing Approach
Static Testing Methods
InspectionsWalkthroughsDesk CheckingPeer Ratings
Static Testing29
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Static Testing30
In software development, static testing, also calleddry run testing , is a form of software testing wherethe authors manually read their documents/code to
find any errors.
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Static Testing Methods31
InspectionsFagan InspectionGilb InspectionTwo Person InspectionN-Fold InspectionMeetingless Inspection
WalkthroughsDesk CheckingPeer Ratings
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Black Box Testing32
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Black Box Testing
Black Box Testing methods
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Black Box Testing Methods33
Equivalence Class Partitioning Testing
Boundary Value Testing
Omission Testing
Null Case Testing
Volume Testing
Load Testing
Stress Testing
Performance Testing
Resource TestingRequirements/Specification Testing
Button Press Testing
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White Box Testing Methods36
Statement Coverage
Segment Coverage
Branch Coverage
Compound Condition CoverageBasis Path Testing
Data Flow Testing
Loop Testing
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Debugging37
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DebuggingBug Life Cycle
Reporting
Bug/Defect Types
Defect ReportMethods of Debugging
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Debugging38
Debugging is the activity which is performed after executing asuccessful test case.
Debugging consists of determining the exact nature andlocation of the suspected error and fixing the error.
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Bug Lifecycle39
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Reporting40
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DailyWeeklyEnd of Cycle
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Bug Types41
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Showstopper
Critical
Non-Critical (Minor)
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Methods of Debugging42
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Debugging by Brute Force Attack
Debugging by Induction
Debugging by Deduction
Debugging by Backtracking
Debugging by Testing
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Quality Management43
Engr. Ali Javed
Quality Management Overview
Quality AssuranceQuality Planning
Quality Control
Software Measurement and Metrics
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Quality Management44
The term Quality management has a specific meaning within manybusiness sectors. This specific definition can be considered to have thefollowing main components:
quality assurancequality planningquality control
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Software Metrics45
Engr. Ali Javed
A software metric is a quantitative measure of degree to whicha system, component or process possesses a given attribute.
Lines of code in a program, number of person-days required to
develop a component, KLOC/defects etc.
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Process Improvement46
Engr. Ali Javed
Process ImprovementProcess and product quality
Process analysis
Process change
CMMI ModelSix Sigma
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Process & Product Quality48
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Productquality
Developmenttechnology
Cost, time andschedule
Processquality
Peoplequality
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Process Analysis49
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Questionnaires and Interviews
Ethnographic Analysis
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Process Change50
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Involves making modifications to existing processes.
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CMMI[9]51
Engr. Ali Javed
CMMI is a process improvement approach that providesorganizations with the essential elements of effective processesthat ultimately improve their performance.
The CMMI model has 5 levels: Initial
Managed
Defined
Quantitatively Managed
Optimizing
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Six Sigma [8]52
Engr. Ali Javed
Six Sigma is a businessmanagement strategy originallydeveloped by Motorola, USA in
1986. As of 2010, it is widely usedin many sectors of industry.
Six Sigma seeks to improve thequality of process outputs byidentifying and removing the causesof defects (errors) and minimizingvariability in manufacturing andbusiness processes.
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Cleanroom Software Engineering [10]53
Engr. Ali Javed
Cleanroom Software Engineering
Cleanroom FunctionsCleanroom Strategy
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References54
1. Software Quality Engineering: Testing, Quality Assurance, and QuantifiableImprovement: JEFF TIAN, 2005.
2. The Art of Software Testing by Glenford Myers
3. Software Engineering by Ian Sommerville
4. Software Engineering by Roger Pressman
5. WhiteBox and BlackBox Testing methods used in LMKR Software house
6. http://www.mosaicinc.com/mosaicinc/rmThisMonth.asp
7. http://en.wikipedia.org/wiki/Quality_management
8. http://en.wikipedia.org/wiki/Six_sigma
9. http://en.wikipedia.org/wiki/CMMI 10. http://en.wikipedia.org/wiki/Cleanroom_software_engineering
Engr. Ali Javed
http://www.mosaicinc.com/mosaicinc/rmThisMonth.asphttp://en.wikipedia.org/wiki/Quality_managementhttp://en.wikipedia.org/wiki/Six_sigmahttp://en.wikipedia.org/wiki/CMMIhttp://en.wikipedia.org/wiki/Cleanroom_software_engineeringhttp://en.wikipedia.org/wiki/Cleanroom_software_engineeringhttp://en.wikipedia.org/wiki/CMMIhttp://en.wikipedia.org/wiki/CMMIhttp://en.wikipedia.org/wiki/Six_sigmahttp://en.wikipedia.org/wiki/Six_sigmahttp://en.wikipedia.org/wiki/Quality_managementhttp://en.wikipedia.org/wiki/Quality_managementhttp://www.mosaicinc.com/mosaicinc/rmThisMonth.asp -
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For any query Feel Free to ask55