humane assessment
DESCRIPTION
ESUG 2011, EdinburghTRANSCRIPT
Stéphane DucasseclearVue
INRIA
assessmentwith Moose
humane
Wednesday, August 24, 2011
moosetechnology.org
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humane-assesment.com
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feedback is key
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feedback is key
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feedback is key
contextualcontinuous
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= complex, large}
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= 250’000 lines of code
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= 250’000 lines of code
* 2 = 500’000 seconds
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= 250’000 lines of code
* 2 = 500’000 seconds
/ 3600 ~ 140 hours
Wednesday, August 24, 2011
= 250’000 lines of code
* 2 = 500’000 seconds
/ 3600 ~ 140 hours
/ 8 ~ 18 days
Wednesday, August 24, 2011
= 250’000 lines of code
* 2 = 500’000 seconds
/ 3600 ~ 140 hours
/ 8 ~ 18 days
/ 20 ~ 1 month
Wednesday, August 24, 2011
Maintenance is continuous Development
Between 50% and 80% of global effort is spent on
“maintenance” !
18% Corrective(fixing reported errors)
18% Adaptive (new platforms)
60% Perfective(new functionality)
4% Other
80%
20%
60%18%
18%4%
“Maintenance”
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Software is like geranium...
when dead, it does not bloom!Wednesday, August 24, 2011
Software is a living entity...
Early decisions were certainly good at that time
But the context changes
Customers change
Technology changes
People change
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forward engineering
actual development}
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reve
rse e
ngin
eerin
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reve
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assessment
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what is the current situation?what can we do about it?
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Current practices
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50% of maintenance is spent reading code!
Between 50% and 80% of global effort is spent on
“maintenance” !
80%
20%
We spend a lot of money at the wrong placewith the wrong tools!
40%
20%40%
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Current practices
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tailoredmanual automatic
generic
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tailoredmanual automatic
generic
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We need dedicated tools to help us!
We need customable tools to control and give
feedback
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hypothesize applyanalysis
interpretconfident?
actactWednesday, August 24, 2011
hypothesizeexistinganalysis?
applyanalysis
interpretconfident?
actactWednesday, August 24, 2011
hypothesizeexistinganalysis?
craftanalysis
applyanalysis
interpretconfident?
actactWednesday, August 24, 2011
hypothesizeexistinganalysis?
craftanalysis
applyanalysis
interpretconfident?
actWednesday, August 24, 2011
hypothesizeexistinganalysis?
craftanalysis
applyanalysis
interpretconfident?
act
assessmenthumane
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An example: who is really behind that package?
(1) Extraction
(2) Modèle
(4) Visualisation
(3) Analyses
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(2) Define a model for code ownership
(1) Extraction
(2) Modèle
(4) Visualisation
(3) Analyses
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(3) Use adequate Map
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Distribution Mapshows propertiesover structure
Ducasse et al 2006
(1) Extraction
(2) Modèle
(4) Visualisation
(3) Analyses
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}
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McCabe = 21
LOC = 75
3,000
classes select: #isGod ...
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McCabe = 21
LOC = 75
3,000
classes select: #isGod ...
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McCabe = 21
LOC = 75
3,000
classes select: #isGod ...
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}
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McCabe = 21
LOC = 75
3,000
classes select: #isGod ...
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}
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McCabe = 21
LOC = 75
3,000
classes select: #isGod ...
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}
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{
McCabe = 21
LOC = 75
3,000
classes select: #isGod ...
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}
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McCabe = 21
LOC = 75
3,000
classes select: #isGod ...
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}
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...McCabe = 21
LOC = 75
3,000
classes select: #isGod
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themoosebook.org
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...McCabe = 21
LOC = 75
3,000
classes select: #isGod
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What is this made of?Wednesday, August 24, 2011
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What is this made of?Wednesday, August 24, 2011
package 1
package 2
...
Class A
Class B
...
method M
method N
...
source code
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}
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...McCabe = 21
LOC = 75
3,000
classes select: #isGod
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}
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reve
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assessment
what is the current situation?what can we do about it?
Wednesday, August 24, 2011
Handling Moose
5 days to get up to speed
21 days to get proficient
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Software engineers that extended Moose
Delphi/Java programmerscustomized modelsextended meta modelsdefined specific rules
Smalltalk programmers new tools to support code integration
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Moose supports Your definition of quality/risk
Example(1) Getting bug maps(2) What info to collect?(3) How to present it?
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Moose gives you the opportunity to control
your process.
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identifyconcern
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identifyconcern
createrule
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identifyconcern
createrule
discussresults
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identifyconcern
agree?
createrule
discussresults
Wednesday, August 24, 2011
identifyconcern
agree?
createrule
discussresults
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identifyconcern
agree?
createrule
discussresults
smalltask?
Wednesday, August 24, 2011
identifyconcern
agree?
createrule
discussresults
smalltask?
solvenow
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identifyconcern
agree?
createrule
discussresults
smalltask?
solvenow
planlater
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identifyconcern
agree?
createrule
discussresults
smalltask?
solvenow
planlater
assessmentdaily
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Wednesday, August 24, 2011
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continuou
s assessm
ent
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feedback is key
specific feedback is better
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assessment must be tailored
explicit
trained
humane
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Tudor Gîrbawww.tudorgirba.com
creativecommons.org/licenses/by/3.0/
Stéphane Ducassestephane.ducasse.free.fr
Wednesday, August 24, 2011