SQA Lecture 1

8/10/2019 SQA Lecture 1

1/55

SOFTWARE QUALITY ENGINEERING

LECTURE # 1

INTRODUCTION

Engr. Ali Javed5 th September, 2012


2/55

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

Engr. Ali Javed


3/55

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/


4/55

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.

4

Engr. Ali Javed


5/55


6/55

Grading Criteria

GradingMid Term - 20%

End Term - 40%Quiz - 10 %Assignment - 10 %Lab Sessions - 20 %

6

Engr. Ali Javed


7/55

Quizzes and Assignments

Quiz- 4 quizzes

2 before mid term2 after mid term

Assignment- 4 assignments

2 before mid term2 after mid term

7

Engr. Ali Javed


8/55

Quality

Quality Engineering

Quality Types

Quality Control vs Quality Assurance

Different views of Quality

Quality Models

Cost of Quality

Software Quality8

Engr. Ali Javed


9/55

Different Views of Quality

Transcendental ViewUser ViewManufacturing ViewProduct ViewValue based View

9

Engr. Ali Javed


10/55

Quality Models

Standard quality models

McCall

ISO/IEC 9126

IEEE

Application or company specific quality models

FURPS

GQM Approach

10

Engr. Ali Javed


11/55

Cost of Quality

Prevention cost:

Appraisal cost:

Failure cost:

Internal failure costExternal failure cost

11

Engr. Ali Javed


12/55

Quality Assurance Classification Scheme for Quality Assurance

Dealing with Pre- Post Release Defects

Defect prevention

Defect Reduction Defect Containment

Quality Assurance12

Engr. Ali Javed


13/55

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

13

Engr. Ali Javed


14/55

Software Quality AssuranceSQA Team

SQA Plan

Software Review

Formal Technical ReviewsReview Guidelines

Software Quality Assurance14

Engr. Ali Javed


15/55

SQA Team15

Testing Manager

Test Team Lead

Test Analyst

Tester

Independent Test Observer

Engr. Ali Javed


16/55

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.

Engr. Ali Javed


17/55

Software Reviews17

What is software review?

Why software reviews?

Objectives

Review Meeting Constraints

Review Meeting Results

Engr. Ali Javed


18/55

Configuration

Software Configuration Management

Baselines

Software Configuration Items

SCM Process

SCM Tasks

Software Configuration Management18

Engr. Ali Javed


19/55

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

Engr. Ali Javed


20/55

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.

Engr. Ali Javed


21/55

SCI21

The items that comprises all information produced asa part of software process are collectively called asoftware configuration items.

Engr. Ali Javed


22/55

SCM Tasks22

Identifications of objects

Version Control

Change Control

Configuration Auditing

Status Reporting

Engr. Ali Javed


23/55

What is Software Testing?

Software Testing ActivitiesSoftware Testing Principles

Test Cases

Basic Types of testing

Methods of Testing

Software Testing23

Engr. Ali Javed


24/55

Software Testing24

Testing is the process of executing a programor system with the intent of finding errors.

by Myers 1979

Engr. Ali Javed


25/55

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.

Engr. Ali Javed


26/55

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

Engr. Ali Javed


27/55

Methods of Testing27

Manual Testing

Automated Testing

Engr. Ali Javed


28/55

Types of Testing28

Black Box Testing

White Box Testing

Gray Box Testing

Engr. Ali Javed


29/55

Introduction of static testingStatic Testing Approach

Static Testing Methods

InspectionsWalkthroughsDesk CheckingPeer Ratings

Static Testing29

Engr. Ali Javed


30/55

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.

Engr. Ali Javed


31/55

Static Testing Methods31

InspectionsFagan InspectionGilb InspectionTwo Person InspectionN-Fold InspectionMeetingless Inspection

WalkthroughsDesk CheckingPeer Ratings

Engr. Ali Javed


32/55

Black Box Testing32

Engr. Ali Javed

Black Box Testing

Black Box Testing methods


33/55

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

Engr. Ali Javed


34/55


35/55


36/55

White Box Testing Methods36

Statement Coverage

Segment Coverage

Branch Coverage

Compound Condition CoverageBasis Path Testing

Data Flow Testing

Loop Testing

Engr. Ali Javed


37/55

Debugging37

Engr. Ali Javed

DebuggingBug Life Cycle

Reporting

Bug/Defect Types

Defect ReportMethods of Debugging


38/55

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.

Engr. Ali Javed


39/55

Bug Lifecycle39

Engr. Ali Javed


40/55

Reporting40

Engr. Ali Javed

DailyWeeklyEnd of Cycle


41/55

Bug Types41

Engr. Ali Javed

Showstopper

Critical

Non-Critical (Minor)


42/55

Methods of Debugging42

Engr. Ali Javed

Debugging by Brute Force Attack

Debugging by Induction

Debugging by Deduction

Debugging by Backtracking

Debugging by Testing


43/55

Quality Management43

Engr. Ali Javed

Quality Management Overview

Quality AssuranceQuality Planning

Quality Control

Software Measurement and Metrics


44/55

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

Engr. Ali Javed


45/55

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.


46/55

Process Improvement46

Engr. Ali Javed

Process ImprovementProcess and product quality

Process analysis

Process change

CMMI ModelSix Sigma


47/55


48/55

Process & Product Quality48

Engr. Ali Javed

Productquality

Developmenttechnology

Cost, time andschedule

Processquality

Peoplequality


49/55

Process Analysis49

Engr. Ali Javed

Questionnaires and Interviews

Ethnographic Analysis


50/55

Process Change50

Engr. Ali Javed

Involves making modifications to existing processes.


51/55

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


52/55

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.


53/55

Cleanroom Software Engineering [10]53

Engr. Ali Javed

Cleanroom Software Engineering

Cleanroom FunctionsCleanroom Strategy


54/55

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


55/55

For any query Feel Free to ask55

Documents

SQA Lecture 1