software process optimizationpart-2) masao ito nil software vcad solutions tomorrow's seed...
TRANSCRIPT
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Software Process Optimization
(Part-2)
Masao ITO
Nil SoftwareVCAD Solutions tomorrow's seed (1993)
Kishida-san
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Contents
• General problem solving framework and software engineering technique
• Steps of software process optimization
• Monitoring and evaluation of SPO’s work and feedback into the organization
• Case study
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1. Motivation
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Motivation
Plan
OriginalGoal
++
Final Goal
Real --
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Motivation
• Our SPO approach is technology-oriented. It is based upon software engineering techniques. We are software engineers and able to apply our technical knowledge to solve various process problems.
• During the long history of software engineering various useful technologies have been developed. So, it is natural to apply way those technologies to solve process problems we encounter in the course of software development projects.
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Transformationinto an immaterial labor
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2. Outline of SPO
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Characteristics of SPO
• Participatory approach
• Using techniques of software engineering
• Comprehensive approach
• whole and part
• analysis and creation (i.e. solving)
• Enjoyable !
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Characteristics of SPOWhat is the difference between SPI and SPO
• SPI based on SPA is good at finding the deficiency comparing with the average software process, if it exists.
• SPO is systemized, it helps many SEPG people to find the better way for changing process. It covers whole software development process as human activities differing among projects and organizations.
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SPO FRAMEWORKrelating topics
Base Model
Self Communion
SoftwareEngineering
ProcessTechniques
OrganizationManagement
ActivityTheory
KAOSCRC card
UML
15508PCM
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KAOS
• KAOS (Knowledge Acquisition in autOmated Specification) is a method for modeling requirements
[Vl91] A. Lamsweerde, et al:, The KAOS Project: Knowledge Acquisition in Automated Specification of Software, Proc. of AAAI Spring Symposium Series, Track: “Design of Composite Systems”, Mar. 1991.
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KAOSgoal, interference, expectation
DevelopSpec.
Get CustomerRequest
DefineSpec.
FeasibilityProblem
Mis-understanding
CustomerUnderstanding
Interference
Goal
Expectation
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CRC card
• CRC (Class Responsibility Collaboration) is a method for retrieving objects in bottom-up manner
Class Name:Superclass:Subclass:
Responsibilities Collaborators
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CRC cardtransformation
Class Name:
Class Name:
Class Name:
Class Name:
Class Name:Class Name:
Class Name:
Class Name:Superclass:Subclass:
Responsibilities Collaborators
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UML
• UML is a modeling language for the software development
Object
_privateMethod2()
_privateMethod1()
method2()
method1()
attribute1: type
attribute2: type
UC x.x
Use Case Name
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Activity Theory
• “Activity Theory is a philosophical and cross-disciplinary framework for studying different forms of human practices as developmental processes, with both individual and social levels interlinked at the same time.” Kuutti(1996)
• The way to articulate contradiction
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Activity TheoryEngeström ’s activity systems thinking
SubjectObject
Outcome
Rules Community Division of labor
Mediating artifactsschema
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Activity Theory5 principles
• Collective, artifact-mediated and object- oriented nature
• Multi-voicedness
• Historicity
• Contradiction as sources of change and development
• Expansive transformation
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Activity Theoryinteraction of activities
AnalystSpec.
Rules Community DoL
Verbal message
Analyst
DoL Community Rules
QA list
DesignerCustomer
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3. Details of Software Process Optimization
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Steps
Participatory Planning
Mission Definition
Analysis/Resolving Support
Closed-WorldModel
Open-WorldModel
Resolving
Mon
itori
ng/E
valu
atio
n
Libr
ary
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Participatory Planning
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Participatory Planningoutline
• Stakeholders analysis
• Abstract problems analysis
• Objectives analysis
• Summarize in SPO Activity Matrix (SAM)
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Participatory Planninganalysis of stakeholder
• Confirm the expected goal
• List on cards all individuals, organizations within the expected goal
• Sort the cards by category
• Select important stakeholders
• Analyze the selected stakeholders in detail
• Tentatively select a target group
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Participatory Planningstakeholder on the card
Basic informationObjective information about socio-cultural structure, technical ability, ...
Problem/ Weaknesses
What kinds of problems and weakness are there ?
Needs What are there needs ?
(Potential) strengths What advantageous quality or resources already exist ? What is the potential capabilities ?
Action to takeWhat kinds of actions can be taken in the above conditions ?
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Participatory Planningabstract problem analysis
• Identify a core problem
• Write the problems that are direct causes of the core problem and place them under the core problem
• Repeat above procedure
• Write the direct effects of the core problems above the core problem
• Repeat above procedure
Problem
Effects
Causes
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Participatory Planningabstract problem analysis
Rework occurred in design phase
Specifications are often misunderstood
Analyst has their own style of writing
Spec. has ambiguityIt’s hard to know the right place of spec.
Old spec. was referred Future version was referred
Rework occurred in implementation phase
Rework occurred in test phase
...
core problem
direct effect
direct causes
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Participatory Planningobjectives analysis
• Identify a core objective
• Write the potential direct means for the core objective and place them under the core objective
• Repeat above procedure
• Write the direct end of the core objective above the core objective
• Repeat above procedure
Objective
Ends
Means
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Participatory Planningobjectives analysis
No rework will occur in design phase
Specifications are understood rightly
Analysts are educated as for writing spec
Format of spec is defined
List of spec to be referred is maintained
No rework will occur in implementation phase
No rework will occur in test phase
...
core objective
direct ends
direct means
Designer have to write CM no. in doc.
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Mission Definition
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Mission Definitionselection
No rework will occur in design phase
Specifications are understood rightly
Analysts are educated as for writing spec
Format of spec is defined
List of spec to be referred is maintained
No rework will occur in implementation phase
No rework will occur in test phase
...
overall goal
outputs
purpose
Designer have to write CM no. in doc.
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Mission DefinitionSPO Activity Matrix (SAM)
• Overall Goal
• What will be aimed at after the mission purpose is achieved ?
• Purpose
• What should the mission achieved within the mission duration ?
• Outputs
• How should the mission achieve the purpose ?
• Actions
• What should be done concretely to produce the outputs ?
• Input
• Personnel, materials, equipment, facilities, and funds
• Preconditions
• Conditions that must be fulfilled before the mission gets underway.
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Mission DefinitionSPO Activity Matrix (SAM)
Summary Verifiable Indicator
Means of Verification
Important Assumption
Overall Goal
Purpose
Outputs
Actions InputsInputsActions InputsInputs
Pre-conditions
Mission Name: Duration: Target Area: Target Group:
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Mission DefinitionSAMs
• SAM might be revised by rethinking of plan or change of situation (it would occur constantly)
....SAM0 SAM1 SAM2 SAMn
planning implementation
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Analysis/Resolving Support
Closed-world Model
Open-world Model
Resolving
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Closed-World Model
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Closed-World Model
• Dig down the activity deeper within our current scope
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Closed-World Modelsteps
• Define the adopted activity
• Write Object-Attribute-Action (OAA) statements
• Describe Quantitative Change graph (QC graph)
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Closed-World ModelObject-Attribute-Action
Developer AnalystShareSpec.
Software Spec.
Functional Spec Non-Functional
{id, text}code
1..n1..2
next
prev
1..n 1..nrefer
create
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Closed-World ModelQC-graph
0
27.5
55.0
82.5
110.0
1 2 3 4 5 6 7 8 9 10
Freq. Access One AnalystFreq. Access Two Analyst
In QC-graph, you do thought experiment quantitatively.
Off course, this data is sample.
QC:Qualitative Change
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Open-World Model
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Open-World Model
• Sketch the problem situation and the ideal solution
• Apply particles to bridge the gap between problem and ideal solution
• Describe and/or tree
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Open-World ModelReal State
AnalystDeveloper A
Developer B
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Open-World Modelideal state
AnalystDeveloper A
Developer B
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Open-World Modelsolution exists between real and ideal state
AnalystDeveloper A
Developer B
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Open-World ModelAND/OR tree
Particles can deliver the right item as a spec to the designer
Particles know which version is needed by
the designer
Particles know about the version that
analyst want to apply
AND
Particles hold the every item of the
specification
AND
Item has the version information
Analyst tells the version when passing
the item
OR
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Resolving
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Resolving
• Analyze Uniqueness
• Examine solutions by dimensionality/pluralization/distribution/transduction
• Generate concepts
• Consolidate concepts and find out ONE solution
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Resolvingcharacteristics
• Action
• Relation and number of objects
• Role of each object
• Attribute of each object
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Closed-World ModelObject-Attribute-Action
Developer AnalystShareSpec.
Software Spec.
Functional Spec Non-Functional
{id, text}code
1..n1..2
next
prev
1..n 1..n
refer
create
change action
change rolechange relation
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Resolvinguniqueness of space-time
• Space
• The size of each characteristics in multidimensional space
• Time
• Variation of characteristics moment by moment
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Monitoring/Evaluation
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Monitoring/Evaluation
• Monitoring is to check the progress of an active mission based on the SAM, and modify the plan if necessary
• Evaluation is to check the accomplished mission by the five evaluation criteria
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Monitoring/Evaluationaim of evaluation
• Get the lesson-learned or future direction from the mission, not for criticizing
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Monitoring/Evaluationevaluation table
RelevanceEffective-
nessEfficiency Impact
Sustain-ability
Overall Goal
Purpose
Outputs
Inputs
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Monitoring/Evaluationevaluation table
Relevance Effective-ness
Efficiency Impact Sustain-ability
Overall Goal
Purpose
Outputs
Inputs
Summary Verifiable Indicator
Means of Verification
Important Assumption
Overall Goal
Purpose
Outputs
Actions InputsInputsActions InputsInputs
Pre-conditions
SAM
Evaluation table
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Monitoring/Evaluation5 evaluation criteria
• Relevance
• Have there been any changes in the organization policy ?
• Effectiveness
• Is the purpose expected to be achieved by the end of period ?
• Efficacy
• Are the “inputs” being utilized properly to produce “Outputs” ?
• Impact
• Is the mission producing any negative effect ?
• Sustainability
• Is the target group properly prepared to sustain the benefits of their process after the mission end ?
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Library
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Library
• A repository for re-use in other cycles. It includes the output of mission:
• SAMs (SAM0, SAM1, ... SAMn)
• Triangles of activity
• OAA
• Evaluation results
• It becomes the asset of your organization