artur górski - how many defects are left
TRANSCRIPT
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MOTOROLA SOLUTIONS
How many defects are left?
© 2015 Motorola Solutions, Inc.
ARTUR GORSKI
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How many defects are left? How many defects are you going to find?
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METHOD 1
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Use Feedback
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Development System Tests Deployment
80
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Development System Tests Deployment
80 40
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Development System Tests Deployment
80 30 40
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© 2016 Motorola Solutions, Inc.
Development System Tests Deployment
80 30 40
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© 2016 Motorola Solutions, Inc.
Development System Tests Deployment
80 30 40
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Defects found during System Tests
Defe
cts
found d
uring D
eplo
ym
ent
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© 2016 Motorola Solutions, Inc.
Defe
cts
found d
uring D
eplo
ym
ent
Defects found during System Tests
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© 2016 Motorola Solutions, Inc.
METHOD 2
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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
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© 2016 Motorola Solutions, Inc. Iterations
Cum
ula
tive N
um
ber
Of D
efe
cts
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Cum
ula
tive N
um
ber
Of D
efe
cts
Iterations
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All models are wrong,
but some are useful
George E.P. Box
“
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METHOD 3
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Waloddi
Weibull (Sweden)
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Metrics and Models in Software Quality Engineering, 2nd Edition [Chapter 7]
Software Reliability Engineering
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Cum
ula
tive N
um
ber
Of D
efe
cts
Testing effort or Time
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© 2016 Motorola Solutions, Inc.
Cum
ula
tive N
um
ber
Of D
efe
cts
Testing effort or Time
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METHOD 4
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Metrics and Models in Software Quality Engineering, 2nd Edition
Cell 1 Cell 2
Cell 3 Cell 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
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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
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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
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Without data you`re just
another person
with an opinion W. Edwards Deming
“
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Start presenting state of quality with defects prediction. @gorski_artur
Cell 3 Cell 4
Cell 2 Cell 1