expert best practices
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SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:Best Practice on e-Project Development
http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Boyan AngelovNemetschek
Penko IvanovRila Solutions
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
eXPERT in Nemetschek
Boyan Angelov
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Nemetschek OOD
The Pilot Project - Aims
Apply eXPERT in real life
project
Gather experience
Collect metrics
Evaluate the approach
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Nemetschek OOD
The Pilot Project - Scope
• Facility Management system
• Real life customer
• New technologies – Microsoft .NET
• Small team
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
eXPERT Application – Phases
Big BangProductive Phase
Evaluation Phase
Project Lifetime
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
eXPERT Application – Phase 1/3
Big Bang Initial Phase
• Execute all practices at once
• Apply strict control over practices application
• Evaluate practices
• Modify bottleneck practices
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
eXPERT Application – Phase 2/3
Productive Phase
• Apply the approach
• Identify key practices
• Refine practices application
• Produce software
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
eXPERT Application – Phase 3/3
Evaluation Phase
• Collect quantitative measures
• Evaluate approach
• Adjust approach
• Collect lessons learnt
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Big Bang phase Prerequisites
• About 2 months length
• The team has worked together on previous
projects
• The team never used XP or PSP before
• The team had 1 week eXPERT training
• The customer did not have any XP experience
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Big Bang phase - 2all or nothing
• Introduce all practices together – good or bad?
• Default practices
• Important practices
• Sequential application – what the sequence
should be?
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Big Bang phase - 3How to make the team do it?
• Developers – right, wrong or just afraid?
• Easily adopted practices
• Not so easily adopted practices
• Hard practices
• Total control over the application of the
practices
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Big Bang phase - 4Initial evaluation and adjustment
• Criteria for evaluation
• Practices that needed immediate adjustment
– Customer on-site
– Planning game
– Test first
• Enough fooling about
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Productive PhaseGet the best of it
• Benefit from the strong sides
– Identify and emphasize on the key practices
– Minimize documentation
• Minimize the effect of the weak sides
– Adjust practices that imply big overhead, but
preserve their benefits
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Productive Phase - 2Key Practices
• Which are they?
Small Releases
Simple Design
Refactoring
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Productive Phase - 3Adjust practices
• Which practices?
– Non-XP Customer – Planning game and Customer
On-site
– Unit testing
– Pair programming
– PSP PROBE method
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Evaluation PhaseCollect quantitative measures
• Why measure?
– eXPERT project requires it
– PSP requires it
– Increases developers discipline
– Provides constant status feedback to management
– Shows the practices that need adjustment
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Evaluation Phase - 2Collect quantitative measures
• What to measure?
– Code metrics – LOC, NOC, NOM, …
– Effort spent on tasks, processes, …
– Costs
– PSP PROBE method – effort per class, LOC, …
– Defects statistics – new, fixed, closed, …
– Unit tests – number of tests, failures, …
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Evaluation Phase - 3Collect quantitative measures
• How to measure?
– Automatic tools - code metrics, unit tests, bugs…
– Manual measurements – effort, PROBE, costs, …
• How often?
– Daily – effort on tasks, PROBE, …
– Weekly
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Evaluation Phase - 4Main results
• No schedule
deviation
• No costs deviation
• Low requirements
management risk
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Evaluation Phase - 5Main Results
Defect rates
NOWBEFORE
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Evaluation Phase - 6Main Results
Efforts per process
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Evaluation Phase - 7Main Results
Unit tests
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Evaluation Phase - 8Main Results
PSP PROBE methodCalculated hours per class type and size
very small small medium large very large
simple UI classes 0,3 0,8 2,0 4,8 11,5
property UI panel classes 1,0 2,2 4,7 10,3 22,5
multi UI panel components 1,4 4,3 13,2 40,9 126,6
model / data classes 1,7 3,0 5,2 9,1 15,8
business logic classes 3,1 5,2 8,9 15,2 25,8
utils/enum/interfaces/events/delegates 0,6 1,1 2,1 4,0 7,5
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Nemetschek Pilot ProjectTools used
• MS Visual Studio.NET – development IDE• MS Visual Source Safe – version tracking• Microsoft Project – effort and cost tracking• MS Excel, MS Word• Bugzilla – defect tracking• NUnit – unit testing• C# Refactory – code refactoring
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
NUnit
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
C# Refactory
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
Nemetschek Pilot ProjectLessons learned
• CR management can be easy• Design can be simple• Coding can be the biggest part of a project• Schedule can be kept• Unit testing improves quality• Estimation can be more precise, but can never be
exact• eXPERT is agile, lightweight and flexible• Documentation can be minimized
SofiaBulgaria
Summer School
Summer School IST-2001-34488 eXPERT:
Best Practice on e-Project Development http://www.esi.es/Expert
30 June - 2 July 2003
30 June - 2 July 2003
eXPERT Best practices
For more information:
bangelov@nemetschek.bgexpert@fmi.uni-sofia.bg
http://www.esi.es/Expert http://www-it.fmi.uni-sofia.bg/Expert
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