SlideShare une entreprise Scribd logo
1  sur  13
Télécharger pour lire hors ligne
Software Reliability Growth Models

Dr. Himanshu Hora
SRMS College of Engineering & Technology
Bareilly (INDIA)
Introduction
“Software reliability growth models can be used as an
indication of the number of failures that may be
encountered after the software has shipped and thus as an
indication of whether the software is ready to ship;

These models use system test data to predict the number
of defects remaining in the software”

2
• Most software reliability growth models have a parameter
that relates to the total number of defects contained in a set
of code. If we know this parameter and the current number
of defects discovered, we know how many defects remain
in the code (see Figure 1).

•

Architecture Business Cycle (ABC)

Figure1-Residual Defects

3
• Knowing the number of residual defects helps us decide
whether or not the code is ready to ship and how much
more testing is required if we decide the code is not ready
to ship. It gives us an estimate of the number of failures
that our customers will encounter when operating the
software.

“Software reliability growth models are a statistical
interpolation of defect detection data by mathematical
functions. The functions are used to predict future failure
rates or the number of residual defects in the code.”
[Alan Wood ,Tandem Software Reliability Growth Models]

4
Software Reliability Growth Model
Data
1. Test Time Data-For a software reliability growth
model developed during QA test, the appropriate measure
of time must relate to the testing effort. There are three
possible candidates for measuring test time:
- calendar time
- number of tests run
- execution (CPU) time.
5
2. Defect DataMajor: Can tolerate the situation, but not for long.
Solution needed.
Critical: Intolerable situation. Solution urgently needed.

3. Grouped Datathe amount of failures and test time that occurred during a
week.

6
Software Reliability Growth Model
Types
Software reliability growth models have been grouped
into two classes of models concave and S-shaped
(figure 2)
The most important thing about both models is that they
have the same asymptotic behavior, i.e., the defect
detection rate decreases as the number of defects detected
(and repaired) increases, and the total number of defects
detected asymptotically approaches a finite value.
7
Figure 2-Concave and S-Shaped Models
8
Software Reliability Growth Model
Examples

9
Table 1- Software Reliability Growth Model examples
10
Goel - Okumoto(G-O) Model
μ(t) = a(l-e ^(-bt)), where
• a = expected total number of defects in the code and
b = shape factor = the rate at which the failure rate
decreases, i.e., the rate at which we approach the total
number of defects.
• The Goel-Okumoto model is a concave model, and the
parameter "a" would be plotted as the total number of
defects in Figure 2
11
Basic Assumptions of Goel-Okumoto Model
• The execution times between the failures are
exponentially distributed.
• The cumulative number of failures follows a Non
Homogeneous Poisson process (NHPP) by its expected
value function μ(t).
• For a period over which the software is observed the
quantities of the resources that are available are constant.
• The number of faults detected in each of the respective
intervals is independent of each other.
[Pankaj Nagar , Blessy Thankachan , “Applications of Goel Okumoto in
Software Reliability Measurement” International Journal of Computer
Applications (0975 – 8887) , November 2012]

12
Thank You

Dr. Himanshu Hora
SRMS College of Engineering & Technology
Bareilly (INDIA)
13

Contenu connexe

Tendances

Software Reliability
Software ReliabilitySoftware Reliability
Software Reliabilityranapoonam1
 
Software maintenance Unit5
Software maintenance  Unit5Software maintenance  Unit5
Software maintenance Unit5Mohammad Faizan
 
Software Cost Estimation Techniques
Software Cost Estimation TechniquesSoftware Cost Estimation Techniques
Software Cost Estimation TechniquesSanthi thi
 
Design Model & User Interface Design in Software Engineering
Design Model & User Interface Design in Software EngineeringDesign Model & User Interface Design in Software Engineering
Design Model & User Interface Design in Software EngineeringMeghaj Mallick
 
Principles of Software testing
Principles of Software testingPrinciples of Software testing
Principles of Software testingMd Mamunur Rashid
 
Software Quality Assurance
Software Quality AssuranceSoftware Quality Assurance
Software Quality AssuranceSaqib Raza
 
Software Engineering ppt
Software Engineering pptSoftware Engineering ppt
Software Engineering pptshruths2890
 
Software Engineering (Testing techniques)
Software Engineering (Testing techniques)Software Engineering (Testing techniques)
Software Engineering (Testing techniques)ShudipPal
 
Software Engineering Process Models
Software Engineering Process Models Software Engineering Process Models
Software Engineering Process Models Satya P. Joshi
 
Software reliability
Software reliabilitySoftware reliability
Software reliabilityAnand Kumar
 
Software project management Software economics
Software project management Software economicsSoftware project management Software economics
Software project management Software economicsREHMAT ULLAH
 
Software process and project metrics
Software process and project metricsSoftware process and project metrics
Software process and project metricsIndu Sharma Bhardwaj
 

Tendances (20)

Software Reliability
Software ReliabilitySoftware Reliability
Software Reliability
 
Software maintenance Unit5
Software maintenance  Unit5Software maintenance  Unit5
Software maintenance Unit5
 
Software Cost Estimation Techniques
Software Cost Estimation TechniquesSoftware Cost Estimation Techniques
Software Cost Estimation Techniques
 
Checkpoints of the Process
Checkpoints of the ProcessCheckpoints of the Process
Checkpoints of the Process
 
Software Quality Metrics
Software Quality MetricsSoftware Quality Metrics
Software Quality Metrics
 
Design Model & User Interface Design in Software Engineering
Design Model & User Interface Design in Software EngineeringDesign Model & User Interface Design in Software Engineering
Design Model & User Interface Design in Software Engineering
 
Principles of Software testing
Principles of Software testingPrinciples of Software testing
Principles of Software testing
 
Software testing ppt
Software testing pptSoftware testing ppt
Software testing ppt
 
Reliability growth models
Reliability growth modelsReliability growth models
Reliability growth models
 
Software Metrics
Software MetricsSoftware Metrics
Software Metrics
 
Software Quality Assurance
Software Quality AssuranceSoftware Quality Assurance
Software Quality Assurance
 
Software Engineering ppt
Software Engineering pptSoftware Engineering ppt
Software Engineering ppt
 
Software Engineering (Testing techniques)
Software Engineering (Testing techniques)Software Engineering (Testing techniques)
Software Engineering (Testing techniques)
 
Software Engineering Process Models
Software Engineering Process Models Software Engineering Process Models
Software Engineering Process Models
 
Software reliability
Software reliabilitySoftware reliability
Software reliability
 
Software testing axioms
Software testing axiomsSoftware testing axioms
Software testing axioms
 
RMMM Plan
RMMM PlanRMMM Plan
RMMM Plan
 
Software project management Software economics
Software project management Software economicsSoftware project management Software economics
Software project management Software economics
 
Software process and project metrics
Software process and project metricsSoftware process and project metrics
Software process and project metrics
 
Software cost estimation
Software cost estimationSoftware cost estimation
Software cost estimation
 

En vedette

Chapter 7 software reliability
Chapter 7 software reliabilityChapter 7 software reliability
Chapter 7 software reliabilitydespicable me
 
Software Reliability Engineering
Software Reliability EngineeringSoftware Reliability Engineering
Software Reliability Engineeringguest90cec6
 
Reliability growth models for quality management
Reliability growth models for quality managementReliability growth models for quality management
Reliability growth models for quality managementRoy Antony Arnold G
 
Software and Hardware Reliability
Software and Hardware ReliabilitySoftware and Hardware Reliability
Software and Hardware ReliabilitySandeep Patalay
 
Overview of software reliability engineering
Overview of software reliability engineeringOverview of software reliability engineering
Overview of software reliability engineeringAnn Marie Neufelder
 
Tenant-based resource allocation model for cost-effective scaling Software-as...
Tenant-based resource allocation model for cost-effective scaling Software-as...Tenant-based resource allocation model for cost-effective scaling Software-as...
Tenant-based resource allocation model for cost-effective scaling Software-as...Javier Mijail Espadas Pech
 
Coding and testing in Software Engineering
Coding and testing in Software EngineeringCoding and testing in Software Engineering
Coding and testing in Software EngineeringAbhay Vijay
 
SQA Profiles
SQA ProfilesSQA Profiles
SQA Profiless-mueller
 
Predicting reliability of software systems under development
Predicting reliability of software systems under developmentPredicting reliability of software systems under development
Predicting reliability of software systems under developmentRAKESH RANA
 
Iwsm2014 mispredicting software reliability (rakesh rana)
Iwsm2014   mispredicting software reliability (rakesh rana)Iwsm2014   mispredicting software reliability (rakesh rana)
Iwsm2014 mispredicting software reliability (rakesh rana)Nesma
 
Couchbase Meetup Jan 2016
Couchbase Meetup Jan 2016Couchbase Meetup Jan 2016
Couchbase Meetup Jan 2016Michael Kehoe
 
SRECon USA 2016: Growing your Entry Level Talent
SRECon USA 2016: Growing your Entry Level TalentSRECon USA 2016: Growing your Entry Level Talent
SRECon USA 2016: Growing your Entry Level TalentMichael Kehoe
 
CouchbasetoHadoop_Matt_Michael_Justin v4
CouchbasetoHadoop_Matt_Michael_Justin v4CouchbasetoHadoop_Matt_Michael_Justin v4
CouchbasetoHadoop_Matt_Michael_Justin v4Michael Kehoe
 
Couchbase Connect 2016: Monitoring Production Deployments The Tools – LinkedIn
Couchbase Connect 2016: Monitoring Production Deployments The Tools – LinkedInCouchbase Connect 2016: Monitoring Production Deployments The Tools – LinkedIn
Couchbase Connect 2016: Monitoring Production Deployments The Tools – LinkedInMichael Kehoe
 
SouthBay SRE Meetup Jan 2016
SouthBay SRE Meetup Jan 2016SouthBay SRE Meetup Jan 2016
SouthBay SRE Meetup Jan 2016Michael Kehoe
 
Couchbase Connect 2016
Couchbase Connect 2016Couchbase Connect 2016
Couchbase Connect 2016Michael Kehoe
 

En vedette (20)

Software Reliability
Software ReliabilitySoftware Reliability
Software Reliability
 
Chapter 7 software reliability
Chapter 7 software reliabilityChapter 7 software reliability
Chapter 7 software reliability
 
Rayleigh model
Rayleigh modelRayleigh model
Rayleigh model
 
Software Reliability Engineering
Software Reliability EngineeringSoftware Reliability Engineering
Software Reliability Engineering
 
Quality & Reliability in Software Engineering
Quality & Reliability in Software EngineeringQuality & Reliability in Software Engineering
Quality & Reliability in Software Engineering
 
Reliability growth models for quality management
Reliability growth models for quality managementReliability growth models for quality management
Reliability growth models for quality management
 
Software and Hardware Reliability
Software and Hardware ReliabilitySoftware and Hardware Reliability
Software and Hardware Reliability
 
Overview of software reliability engineering
Overview of software reliability engineeringOverview of software reliability engineering
Overview of software reliability engineering
 
Tenant-based resource allocation model for cost-effective scaling Software-as...
Tenant-based resource allocation model for cost-effective scaling Software-as...Tenant-based resource allocation model for cost-effective scaling Software-as...
Tenant-based resource allocation model for cost-effective scaling Software-as...
 
Coding and testing in Software Engineering
Coding and testing in Software EngineeringCoding and testing in Software Engineering
Coding and testing in Software Engineering
 
SQA Profiles
SQA ProfilesSQA Profiles
SQA Profiles
 
Predicting reliability of software systems under development
Predicting reliability of software systems under developmentPredicting reliability of software systems under development
Predicting reliability of software systems under development
 
Iwsm2014 mispredicting software reliability (rakesh rana)
Iwsm2014   mispredicting software reliability (rakesh rana)Iwsm2014   mispredicting software reliability (rakesh rana)
Iwsm2014 mispredicting software reliability (rakesh rana)
 
SRE Tools
SRE ToolsSRE Tools
SRE Tools
 
Couchbase Meetup Jan 2016
Couchbase Meetup Jan 2016Couchbase Meetup Jan 2016
Couchbase Meetup Jan 2016
 
SRECon USA 2016: Growing your Entry Level Talent
SRECon USA 2016: Growing your Entry Level TalentSRECon USA 2016: Growing your Entry Level Talent
SRECon USA 2016: Growing your Entry Level Talent
 
CouchbasetoHadoop_Matt_Michael_Justin v4
CouchbasetoHadoop_Matt_Michael_Justin v4CouchbasetoHadoop_Matt_Michael_Justin v4
CouchbasetoHadoop_Matt_Michael_Justin v4
 
Couchbase Connect 2016: Monitoring Production Deployments The Tools – LinkedIn
Couchbase Connect 2016: Monitoring Production Deployments The Tools – LinkedInCouchbase Connect 2016: Monitoring Production Deployments The Tools – LinkedIn
Couchbase Connect 2016: Monitoring Production Deployments The Tools – LinkedIn
 
SouthBay SRE Meetup Jan 2016
SouthBay SRE Meetup Jan 2016SouthBay SRE Meetup Jan 2016
SouthBay SRE Meetup Jan 2016
 
Couchbase Connect 2016
Couchbase Connect 2016Couchbase Connect 2016
Couchbase Connect 2016
 

Similaire à Software reliability growth model

A Review On Software Reliability.
A Review On Software Reliability.A Review On Software Reliability.
A Review On Software Reliability.Kelly Taylor
 
IJCER (www.ijceronline.com) International Journal of computational Engineerin...
IJCER (www.ijceronline.com) International Journal of computational Engineerin...IJCER (www.ijceronline.com) International Journal of computational Engineerin...
IJCER (www.ijceronline.com) International Journal of computational Engineerin...ijceronline
 
IJCER (www.ijceronline.com) International Journal of computational Engineerin...
IJCER (www.ijceronline.com) International Journal of computational Engineerin...IJCER (www.ijceronline.com) International Journal of computational Engineerin...
IJCER (www.ijceronline.com) International Journal of computational Engineerin...ijceronline
 
A Review on Parameter Estimation Techniques of Software Reliability Growth Mo...
A Review on Parameter Estimation Techniques of Software Reliability Growth Mo...A Review on Parameter Estimation Techniques of Software Reliability Growth Mo...
A Review on Parameter Estimation Techniques of Software Reliability Growth Mo...Editor IJCATR
 
A Novel Approach to Derive the Average-Case Behavior of Distributed Embedded ...
A Novel Approach to Derive the Average-Case Behavior of Distributed Embedded ...A Novel Approach to Derive the Average-Case Behavior of Distributed Embedded ...
A Novel Approach to Derive the Average-Case Behavior of Distributed Embedded ...ijccmsjournal
 
IRJET- A Study on Software Reliability Models
IRJET-  	  A Study on Software Reliability ModelsIRJET-  	  A Study on Software Reliability Models
IRJET- A Study on Software Reliability ModelsIRJET Journal
 
Using Fuzzy Clustering and Software Metrics to Predict Faults in large Indust...
Using Fuzzy Clustering and Software Metrics to Predict Faults in large Indust...Using Fuzzy Clustering and Software Metrics to Predict Faults in large Indust...
Using Fuzzy Clustering and Software Metrics to Predict Faults in large Indust...IOSR Journals
 
Software testing effort estimation with cobb douglas function a practical app...
Software testing effort estimation with cobb douglas function a practical app...Software testing effort estimation with cobb douglas function a practical app...
Software testing effort estimation with cobb douglas function a practical app...eSAT Publishing House
 
Software testing effort estimation with cobb douglas function- a practical ap...
Software testing effort estimation with cobb douglas function- a practical ap...Software testing effort estimation with cobb douglas function- a practical ap...
Software testing effort estimation with cobb douglas function- a practical ap...eSAT Journals
 
A Compound Metric for Identification of Fault Prone Modules
A Compound Metric for Identification of Fault Prone ModulesA Compound Metric for Identification of Fault Prone Modules
A Compound Metric for Identification of Fault Prone Modulesiosrjce
 
Developing software analyzers tool using software reliability growth model
Developing software analyzers tool using software reliability growth modelDeveloping software analyzers tool using software reliability growth model
Developing software analyzers tool using software reliability growth modelIAEME Publication
 
Developing software analyzers tool using software reliability growth model
Developing software analyzers tool using software reliability growth modelDeveloping software analyzers tool using software reliability growth model
Developing software analyzers tool using software reliability growth modelIAEME Publication
 
Volume 2-issue-6-1983-1986
Volume 2-issue-6-1983-1986Volume 2-issue-6-1983-1986
Volume 2-issue-6-1983-1986Editor IJARCET
 
Volume 2-issue-6-1983-1986
Volume 2-issue-6-1983-1986Volume 2-issue-6-1983-1986
Volume 2-issue-6-1983-1986Editor IJARCET
 
A value added predictive defect type distribution model
A value added predictive defect type distribution modelA value added predictive defect type distribution model
A value added predictive defect type distribution modelUmeshchandraYadav5
 

Similaire à Software reliability growth model (20)

Ashish
AshishAshish
Ashish
 
A Review On Software Reliability.
A Review On Software Reliability.A Review On Software Reliability.
A Review On Software Reliability.
 
J034057065
J034057065J034057065
J034057065
 
IJCER (www.ijceronline.com) International Journal of computational Engineerin...
IJCER (www.ijceronline.com) International Journal of computational Engineerin...IJCER (www.ijceronline.com) International Journal of computational Engineerin...
IJCER (www.ijceronline.com) International Journal of computational Engineerin...
 
IJCER (www.ijceronline.com) International Journal of computational Engineerin...
IJCER (www.ijceronline.com) International Journal of computational Engineerin...IJCER (www.ijceronline.com) International Journal of computational Engineerin...
IJCER (www.ijceronline.com) International Journal of computational Engineerin...
 
A Review on Parameter Estimation Techniques of Software Reliability Growth Mo...
A Review on Parameter Estimation Techniques of Software Reliability Growth Mo...A Review on Parameter Estimation Techniques of Software Reliability Growth Mo...
A Review on Parameter Estimation Techniques of Software Reliability Growth Mo...
 
A Novel Approach to Derive the Average-Case Behavior of Distributed Embedded ...
A Novel Approach to Derive the Average-Case Behavior of Distributed Embedded ...A Novel Approach to Derive the Average-Case Behavior of Distributed Embedded ...
A Novel Approach to Derive the Average-Case Behavior of Distributed Embedded ...
 
IRJET- A Study on Software Reliability Models
IRJET-  	  A Study on Software Reliability ModelsIRJET-  	  A Study on Software Reliability Models
IRJET- A Study on Software Reliability Models
 
O0181397100
O0181397100O0181397100
O0181397100
 
D0423022028
D0423022028D0423022028
D0423022028
 
Using Fuzzy Clustering and Software Metrics to Predict Faults in large Indust...
Using Fuzzy Clustering and Software Metrics to Predict Faults in large Indust...Using Fuzzy Clustering and Software Metrics to Predict Faults in large Indust...
Using Fuzzy Clustering and Software Metrics to Predict Faults in large Indust...
 
Software testing effort estimation with cobb douglas function a practical app...
Software testing effort estimation with cobb douglas function a practical app...Software testing effort estimation with cobb douglas function a practical app...
Software testing effort estimation with cobb douglas function a practical app...
 
Software testing effort estimation with cobb douglas function- a practical ap...
Software testing effort estimation with cobb douglas function- a practical ap...Software testing effort estimation with cobb douglas function- a practical ap...
Software testing effort estimation with cobb douglas function- a practical ap...
 
A Compound Metric for Identification of Fault Prone Modules
A Compound Metric for Identification of Fault Prone ModulesA Compound Metric for Identification of Fault Prone Modules
A Compound Metric for Identification of Fault Prone Modules
 
G017653135
G017653135G017653135
G017653135
 
Developing software analyzers tool using software reliability growth model
Developing software analyzers tool using software reliability growth modelDeveloping software analyzers tool using software reliability growth model
Developing software analyzers tool using software reliability growth model
 
Developing software analyzers tool using software reliability growth model
Developing software analyzers tool using software reliability growth modelDeveloping software analyzers tool using software reliability growth model
Developing software analyzers tool using software reliability growth model
 
Volume 2-issue-6-1983-1986
Volume 2-issue-6-1983-1986Volume 2-issue-6-1983-1986
Volume 2-issue-6-1983-1986
 
Volume 2-issue-6-1983-1986
Volume 2-issue-6-1983-1986Volume 2-issue-6-1983-1986
Volume 2-issue-6-1983-1986
 
A value added predictive defect type distribution model
A value added predictive defect type distribution modelA value added predictive defect type distribution model
A value added predictive defect type distribution model
 

Plus de Himanshu

Structural patterns
Structural patternsStructural patterns
Structural patternsHimanshu
 
Software product line
Software product lineSoftware product line
Software product lineHimanshu
 
Shared information systems
Shared information systemsShared information systems
Shared information systemsHimanshu
 
Design Pattern
Design PatternDesign Pattern
Design PatternHimanshu
 
Creational pattern
Creational patternCreational pattern
Creational patternHimanshu
 
Architecture Review
Architecture ReviewArchitecture Review
Architecture ReviewHimanshu
 
Reliability and its principals
Reliability and its principalsReliability and its principals
Reliability and its principalsHimanshu
 
Structural and functional testing
Structural and functional testingStructural and functional testing
Structural and functional testingHimanshu
 
White box black box & gray box testing
White box black box & gray box testingWhite box black box & gray box testing
White box black box & gray box testingHimanshu
 
Pareto analysis
Pareto analysisPareto analysis
Pareto analysisHimanshu
 
Load runner & win runner
Load runner & win runnerLoad runner & win runner
Load runner & win runnerHimanshu
 
Crud and jad
Crud and jadCrud and jad
Crud and jadHimanshu
 
Junit and cactus
Junit and cactusJunit and cactus
Junit and cactusHimanshu
 
Risk based testing and random testing
Risk based testing and random testingRisk based testing and random testing
Risk based testing and random testingHimanshu
 
Testing a data warehouses
Testing a data warehousesTesting a data warehouses
Testing a data warehousesHimanshu
 
Software testing tools and its taxonomy
Software testing tools and its taxonomySoftware testing tools and its taxonomy
Software testing tools and its taxonomyHimanshu
 
Software reliability engineering process
Software reliability engineering processSoftware reliability engineering process
Software reliability engineering processHimanshu
 
Software reliability tools and common software errors
Software reliability tools and common software errorsSoftware reliability tools and common software errors
Software reliability tools and common software errorsHimanshu
 
Regression and performance testing
Regression and performance testingRegression and performance testing
Regression and performance testingHimanshu
 

Plus de Himanshu (20)

Structural patterns
Structural patternsStructural patterns
Structural patterns
 
Software product line
Software product lineSoftware product line
Software product line
 
Shared information systems
Shared information systemsShared information systems
Shared information systems
 
Saam
SaamSaam
Saam
 
Design Pattern
Design PatternDesign Pattern
Design Pattern
 
Creational pattern
Creational patternCreational pattern
Creational pattern
 
Architecture Review
Architecture ReviewArchitecture Review
Architecture Review
 
Reliability and its principals
Reliability and its principalsReliability and its principals
Reliability and its principals
 
Structural and functional testing
Structural and functional testingStructural and functional testing
Structural and functional testing
 
White box black box & gray box testing
White box black box & gray box testingWhite box black box & gray box testing
White box black box & gray box testing
 
Pareto analysis
Pareto analysisPareto analysis
Pareto analysis
 
Load runner & win runner
Load runner & win runnerLoad runner & win runner
Load runner & win runner
 
Crud and jad
Crud and jadCrud and jad
Crud and jad
 
Junit and cactus
Junit and cactusJunit and cactus
Junit and cactus
 
Risk based testing and random testing
Risk based testing and random testingRisk based testing and random testing
Risk based testing and random testing
 
Testing a data warehouses
Testing a data warehousesTesting a data warehouses
Testing a data warehouses
 
Software testing tools and its taxonomy
Software testing tools and its taxonomySoftware testing tools and its taxonomy
Software testing tools and its taxonomy
 
Software reliability engineering process
Software reliability engineering processSoftware reliability engineering process
Software reliability engineering process
 
Software reliability tools and common software errors
Software reliability tools and common software errorsSoftware reliability tools and common software errors
Software reliability tools and common software errors
 
Regression and performance testing
Regression and performance testingRegression and performance testing
Regression and performance testing
 

Dernier

AUDIENCE THEORY -- FANDOM -- JENKINS.pptx
AUDIENCE THEORY -- FANDOM -- JENKINS.pptxAUDIENCE THEORY -- FANDOM -- JENKINS.pptx
AUDIENCE THEORY -- FANDOM -- JENKINS.pptxiammrhaywood
 
How to Use api.constrains ( ) in Odoo 17
How to Use api.constrains ( ) in Odoo 17How to Use api.constrains ( ) in Odoo 17
How to Use api.constrains ( ) in Odoo 17Celine George
 
Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...raviapr7
 
Philosophy of Education and Educational Philosophy
Philosophy of Education  and Educational PhilosophyPhilosophy of Education  and Educational Philosophy
Philosophy of Education and Educational PhilosophyShuvankar Madhu
 
5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...CaraSkikne1
 
UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE
 
Patterns of Written Texts Across Disciplines.pptx
Patterns of Written Texts Across Disciplines.pptxPatterns of Written Texts Across Disciplines.pptx
Patterns of Written Texts Across Disciplines.pptxMYDA ANGELICA SUAN
 
The Singapore Teaching Practice document
The Singapore Teaching Practice documentThe Singapore Teaching Practice document
The Singapore Teaching Practice documentXsasf Sfdfasd
 
How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17Celine George
 
Drug Information Services- DIC and Sources.
Drug Information Services- DIC and Sources.Drug Information Services- DIC and Sources.
Drug Information Services- DIC and Sources.raviapr7
 
Presentation on the Basics of Writing. Writing a Paragraph
Presentation on the Basics of Writing. Writing a ParagraphPresentation on the Basics of Writing. Writing a Paragraph
Presentation on the Basics of Writing. Writing a ParagraphNetziValdelomar1
 
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptxPractical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptxKatherine Villaluna
 
Human-AI Co-Creation of Worked Examples for Programming Classes
Human-AI Co-Creation of Worked Examples for Programming ClassesHuman-AI Co-Creation of Worked Examples for Programming Classes
Human-AI Co-Creation of Worked Examples for Programming ClassesMohammad Hassany
 
CapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptxCapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptxCapitolTechU
 
Benefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive EducationBenefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive EducationMJDuyan
 
3.21.24 The Origins of Black Power.pptx
3.21.24  The Origins of Black Power.pptx3.21.24  The Origins of Black Power.pptx
3.21.24 The Origins of Black Power.pptxmary850239
 
General views of Histopathology and step
General views of Histopathology and stepGeneral views of Histopathology and step
General views of Histopathology and stepobaje godwin sunday
 
Quality Assurance_GOOD LABORATORY PRACTICE
Quality Assurance_GOOD LABORATORY PRACTICEQuality Assurance_GOOD LABORATORY PRACTICE
Quality Assurance_GOOD LABORATORY PRACTICESayali Powar
 
Education and training program in the hospital APR.pptx
Education and training program in the hospital APR.pptxEducation and training program in the hospital APR.pptx
Education and training program in the hospital APR.pptxraviapr7
 

Dernier (20)

Personal Resilience in Project Management 2 - TV Edit 1a.pdf
Personal Resilience in Project Management 2 - TV Edit 1a.pdfPersonal Resilience in Project Management 2 - TV Edit 1a.pdf
Personal Resilience in Project Management 2 - TV Edit 1a.pdf
 
AUDIENCE THEORY -- FANDOM -- JENKINS.pptx
AUDIENCE THEORY -- FANDOM -- JENKINS.pptxAUDIENCE THEORY -- FANDOM -- JENKINS.pptx
AUDIENCE THEORY -- FANDOM -- JENKINS.pptx
 
How to Use api.constrains ( ) in Odoo 17
How to Use api.constrains ( ) in Odoo 17How to Use api.constrains ( ) in Odoo 17
How to Use api.constrains ( ) in Odoo 17
 
Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...
 
Philosophy of Education and Educational Philosophy
Philosophy of Education  and Educational PhilosophyPhilosophy of Education  and Educational Philosophy
Philosophy of Education and Educational Philosophy
 
5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...
 
UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024
 
Patterns of Written Texts Across Disciplines.pptx
Patterns of Written Texts Across Disciplines.pptxPatterns of Written Texts Across Disciplines.pptx
Patterns of Written Texts Across Disciplines.pptx
 
The Singapore Teaching Practice document
The Singapore Teaching Practice documentThe Singapore Teaching Practice document
The Singapore Teaching Practice document
 
How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17
 
Drug Information Services- DIC and Sources.
Drug Information Services- DIC and Sources.Drug Information Services- DIC and Sources.
Drug Information Services- DIC and Sources.
 
Presentation on the Basics of Writing. Writing a Paragraph
Presentation on the Basics of Writing. Writing a ParagraphPresentation on the Basics of Writing. Writing a Paragraph
Presentation on the Basics of Writing. Writing a Paragraph
 
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptxPractical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptx
 
Human-AI Co-Creation of Worked Examples for Programming Classes
Human-AI Co-Creation of Worked Examples for Programming ClassesHuman-AI Co-Creation of Worked Examples for Programming Classes
Human-AI Co-Creation of Worked Examples for Programming Classes
 
CapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptxCapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptx
 
Benefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive EducationBenefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive Education
 
3.21.24 The Origins of Black Power.pptx
3.21.24  The Origins of Black Power.pptx3.21.24  The Origins of Black Power.pptx
3.21.24 The Origins of Black Power.pptx
 
General views of Histopathology and step
General views of Histopathology and stepGeneral views of Histopathology and step
General views of Histopathology and step
 
Quality Assurance_GOOD LABORATORY PRACTICE
Quality Assurance_GOOD LABORATORY PRACTICEQuality Assurance_GOOD LABORATORY PRACTICE
Quality Assurance_GOOD LABORATORY PRACTICE
 
Education and training program in the hospital APR.pptx
Education and training program in the hospital APR.pptxEducation and training program in the hospital APR.pptx
Education and training program in the hospital APR.pptx
 

Software reliability growth model

  • 1. Software Reliability Growth Models Dr. Himanshu Hora SRMS College of Engineering & Technology Bareilly (INDIA)
  • 2. Introduction “Software reliability growth models can be used as an indication of the number of failures that may be encountered after the software has shipped and thus as an indication of whether the software is ready to ship; These models use system test data to predict the number of defects remaining in the software” 2
  • 3. • Most software reliability growth models have a parameter that relates to the total number of defects contained in a set of code. If we know this parameter and the current number of defects discovered, we know how many defects remain in the code (see Figure 1). • Architecture Business Cycle (ABC) Figure1-Residual Defects 3
  • 4. • Knowing the number of residual defects helps us decide whether or not the code is ready to ship and how much more testing is required if we decide the code is not ready to ship. It gives us an estimate of the number of failures that our customers will encounter when operating the software. “Software reliability growth models are a statistical interpolation of defect detection data by mathematical functions. The functions are used to predict future failure rates or the number of residual defects in the code.” [Alan Wood ,Tandem Software Reliability Growth Models] 4
  • 5. Software Reliability Growth Model Data 1. Test Time Data-For a software reliability growth model developed during QA test, the appropriate measure of time must relate to the testing effort. There are three possible candidates for measuring test time: - calendar time - number of tests run - execution (CPU) time. 5
  • 6. 2. Defect DataMajor: Can tolerate the situation, but not for long. Solution needed. Critical: Intolerable situation. Solution urgently needed. 3. Grouped Datathe amount of failures and test time that occurred during a week. 6
  • 7. Software Reliability Growth Model Types Software reliability growth models have been grouped into two classes of models concave and S-shaped (figure 2) The most important thing about both models is that they have the same asymptotic behavior, i.e., the defect detection rate decreases as the number of defects detected (and repaired) increases, and the total number of defects detected asymptotically approaches a finite value. 7
  • 8. Figure 2-Concave and S-Shaped Models 8
  • 9. Software Reliability Growth Model Examples 9
  • 10. Table 1- Software Reliability Growth Model examples 10
  • 11. Goel - Okumoto(G-O) Model μ(t) = a(l-e ^(-bt)), where • a = expected total number of defects in the code and b = shape factor = the rate at which the failure rate decreases, i.e., the rate at which we approach the total number of defects. • The Goel-Okumoto model is a concave model, and the parameter "a" would be plotted as the total number of defects in Figure 2 11
  • 12. Basic Assumptions of Goel-Okumoto Model • The execution times between the failures are exponentially distributed. • The cumulative number of failures follows a Non Homogeneous Poisson process (NHPP) by its expected value function μ(t). • For a period over which the software is observed the quantities of the resources that are available are constant. • The number of faults detected in each of the respective intervals is independent of each other. [Pankaj Nagar , Blessy Thankachan , “Applications of Goel Okumoto in Software Reliability Measurement” International Journal of Computer Applications (0975 – 8887) , November 2012] 12
  • 13. Thank You Dr. Himanshu Hora SRMS College of Engineering & Technology Bareilly (INDIA) 13