intro to essence(berlin) ivar
DESCRIPTION
This presentation was given by Dr. Ivar Jacobson in the Essence Information Day held in OMG Technical Meeting in Berlin, Germany on June 20, 2013. The presentation points out chronic problems of software engineering and the need for a solid theoretical base of software engineering. It then explains Essence Kernel as widely agreed elements of software engineering and how the Kernel can help improve software engineering by enabling agile enactment and use of methods.TRANSCRIPT
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The EssenceInitiative
Ivar Jacobson
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Agenda
Specific Problems
A Case for Action
- Defining a solid theoretical base
- Finding a kernel of widely agreed elements
Using the Kernel
Final Words
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Being in the software development business
Everyone of us knows how to develop our software,
but as a community we have no
widely accepted common ground
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A CASE FOR ACTION STATEMENT
• Software engineering is gravely hampered today by immature practices. Specific problems include:
– The prevalence of fads more typical of fashion industry than of an engineering discipline.
– The lack of a sound, widely accepted theoretical basis.
– The huge number of methods and method variants, with differences little understood and artificially magnified.
– The lack of credible experimental evaluation and validation.
– The split between industry practice and academic research.
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Agenda
Specific Problems
A Case for Action
- Defining a solid theoretical base
- Finding a kernel of widely agreed elements
Using the Kernel
Final Words
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The SEMAT initiative
Software Engineering Method and Theory
www.semat.org
Founded by the Troika in September 2009:
Ivar Jacobson – Bertrand Meyer – Richard Soley
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What are we going to do about it?
The Grand VisionWe support a process to refound software engineering based on a solid theory, proven principles and best practices
Defining a solid
theoretical basis
A Kernel of widely agreed
elements
The Next Steps
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Desired solution: Method ArchitectureThere are probably more than 100,000 methods incl. for instance SADT,
Booch, OMT, RUP, CMMI, XP, Scrum, Lean,
Kanban
There are around 250 identified practices incl for instance use cases, use stories, features,
components,
The Kernel includes such elements as
Requirement, Software system,
Work, Team, Way-of-working, etc.
Standing on a solid theoretical basis
The Language is a scripting language easy to use by practitioners.
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Standing on a solid theoretical basis
Desired solution: Method Architecture
The Essence=Kernel+Language
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Standing on a solid theoretical basis
Desired solution: Method Architecture
The EssenceKernel+Language
Essence will most likely be a standard
2013
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Agenda
Specific Problems
A Case for Action
- Defining a solid theoretical base
- Finding a kernel of widely agreed elements
Using the Kernel
Final Words
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Standing on a Solid Theory
Examples:
– Maxwell’s equations,
– The Big Bang Theory,
– The Theory of the Cell,
– The Theory of Supply and Demand,
– A General Theory of Crime,
– General Theory of Action
– General Theory of Human Information Processing
– Theory of Organizational Structure
“There is nothing so practical as a good theory!”
- Kurt Lewin
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Software Engineering doesn’t lack theories
There are abundant theories in software engineering:
•Boehm’s The Constructive Cost Model – COCOMO,
•Parnas’ principle of information hiding,
•Constantine’s Cohesion and Coupling,
•Conway’s Law,
•Dijkstra’s theory of cognitive limits (“Go to statement considered harmful”),
•Wirth’s stepwise refinement,
•Meyer’s Design by Contract,
•Etc., etc., etc..
But none of these theories are foundational
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Software Engineering doesn’t lack theories
Boehm
Parnas
Conway
Dijkstra
Meyer
Wirth
Constantine
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Software Engineering doesn’t lack theories
SEMAT wants to provide the core theory on which more specialised theories can stand
Core Theory – The Essence
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Agenda
Specific Problems
A Case for Action
- Defining a solid theoretical base
- Finding a kernel of widely agreed elements
Using the Kernel
Final Words
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A kernel of widely-agreed elements
The Kernel includes elements which are universal for all software development efforts
• The Kernel should be harvested from a large number of methods
• The Kernel is practice and method independent
Kernel
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Include a kernel of widely-agreed elements
The Kernel includes the essence of software engineering
“I am freeing the statue from the block” - Michelangelo (attributed)
So to paraphrase Michelangelo: “We are freeing the kernel
from the methods”
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In a Nut Shell – what we WILL change
ExecutivesBig companies have many processes. Challenges:-Reuse practices-Reuse training-“Reuse” of people-Evolutionary improvement is hard
ProfessionalsWant to become experts. Challenges:-Their skills are not easily reusable for a new product.-Their career path follows a zig-zag track from hype to hype.
Education-Teaching instances of methods such as Scrum, RUP, instead of common base; doesn’t create generalists
SEMAT targets the whole software community.
Industry AcademicsResearch-The Gap between research and industry-No widely accepted theory
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Summary – What is new?
“This (SEMAT) meeting in Zurich (2010) is likely to be an historic occasion much like the 1968 NATO session in Garmish.”
- Watts Humphrey (CMMI)