artur górski - how many defects are left

MOTOROLA SOLUTIONS

How many defects are left?

© 2015 Motorola Solutions, Inc.

ARTUR GORSKI

How many defects are left? How many defects are you going to find?

© 2015 Motorola Solutions, Inc.

© 2016 Motorola Solutions, Inc.

© 2016 Motorola Solutions, Inc.

© 2016 Motorola Solutions, Inc.

© 2016 Motorola Solutions, Inc.

METHOD 1

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Use Feedback

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Development System Tests Deployment

80

© 2016 Motorola Solutions, Inc.

Development System Tests Deployment

80 40

© 2016 Motorola Solutions, Inc.

Development System Tests Deployment

80 30 40

© 2016 Motorola Solutions, Inc.

Development System Tests Deployment

80 30 40

© 2016 Motorola Solutions, Inc.

Development System Tests Deployment

80 30 40

© 2016 Motorola Solutions, Inc.

© 2016 Motorola Solutions, Inc.

Defects found during System Tests

Defe

cts

found d

uring D

eplo

ym

ent

© 2016 Motorola Solutions, Inc.

Defe

cts

found d

uring D

eplo

ym

ent

Defects found during System Tests

© 2016 Motorola Solutions, Inc.

METHOD 2

Source of defects?

COMPLEXITY

INJECTION RATE

SIZE

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© 2016 Motorola Solutions, Inc. Number of injected defects

Pro

babili

ty

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Cum

ula

tive N

um

ber

Of D

efe

cts

Iterations

© 2016 Motorola Solutions, Inc. Iterations

Cum

ula

tive N

um

ber

Of D

efe

cts

© 2016 Motorola Solutions, Inc.

Cum

ula

tive N

um

ber

Of D

efe

cts

Iterations

© 2016 Motorola Solutions, Inc.

All models are wrong,

but some are useful

George E.P. Box

“

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METHOD 3

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© 2016 Motorola Solutions, Inc.

Waloddi

Weibull (Sweden)

© 2016 Motorola Solutions, Inc.

Metrics and Models in Software Quality Engineering, 2nd Edition [Chapter 7]

Software Reliability Engineering

© 2016 Motorola Solutions, Inc.

Cum

ula

tive N

um

ber

Of D

efe

cts

Testing effort or Time

© 2016 Motorola Solutions, Inc.

Cum

ula

tive N

um

ber

Of D

efe

cts

Testing effort or Time

© 2016 Motorola Solutions, Inc.

© 2016 Motorola Solutions, Inc.

© 2016 Motorola Solutions, Inc.

METHOD 4

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© 2016 Motorola Solutions, Inc.

Metrics and Models in Software Quality Engineering, 2nd Edition

Cell 1 Cell 2

Cell 3 Cell 4

© 2016 Motorola Solutions, Inc.

Metrics and Models in Software Quality Engineering, 2nd Edition

Cell 1 Cell 2

Cell 3 Cell 4

© 2016 Motorola Solutions, Inc.

Metrics and Models in Software Quality Engineering, 2nd Edition

Cell 1 Cell 2

Cell 3 Cell 4

© 2016 Motorola Solutions, Inc.

Metrics and Models in Software Quality Engineering, 2nd Edition

Cell 1 Cell 2

Cell 3 Cell 4

© 2016 Motorola Solutions, Inc.

Without data you`re just

another person

with an opinion W. Edwards Deming

“

© 2016 Motorola Solutions, Inc.

© 2016 Motorola Solutions, Inc.

Start presenting state of quality with defects prediction. @gorski_artur

Cell 3 Cell 4

Cell 2 Cell 1

artek.gorski@gmail.com