msf-based process patterns
DESCRIPTION
MSF-based process patterns. Dmitry Malenko ( [email protected] ) Vladimir Pavlov ( [email protected] ). About the authors. Dmitry Malenko ( Ukraine ) Graduate student, Dnepropetrovsk National University MCSD for .NET Member of ACM Vladimir Pavlov (Ukraine/USA) - PowerPoint PPT PresentationTRANSCRIPT
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About the authors Dmitry Malenko (Ukraine)
Graduate student, Dnepropetrovsk National University
MCSD for .NET Member of ACM
Vladimir Pavlov (Ukraine/USA) Chief Technical Officer of eLine Software,
Inc. Microsoft Endorsed MSF Practitioner,
MCSD for .NET, MCSD, MCDBA, MCT, CompTIA Certified IT Project+
Member of PMI, ACM, IEEE and IEEE Computer Society
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SPEM and Process Engineering: the big picture
Step 1
Step 5
Step 4
Step 3Step 2
Step 6Step 7
SPEM Model
Tool that supports SPEM
Set of automatedworkbenches
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Our agenda Introduction
From design patterns to process and organizational patterns
From UML to SPEM Microsoft Solutions Framework
Process patterns in MSF Living document Reenterable process Smart lifecycle Stakeholder-oriented organization
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Design patterns
Design patterns are descriptions of communicating objects and classes that are customized to solve a general design problem in a particular context
E. Gamma at al. Design Patterns: Elements of Reusable Object-Oriented Software, 1995.
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The way to design patterns
Design déjà-vu — feeling that you've solved a problem before but not knowing exactly where or how
Reusing and refining design solutions we had in past
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Appeal of design patterns
Depicted using UML notation Easy to understand at one sight Formal enough
Clear rationale behind Highly abstract and therefore
widely reusable
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Popularity of design patterns
Internet search for “design patterns” gives more than 7 000 000 links
More than 300 books on the subject on the Amazon.com
IDE support for design patterns at programmer’s workspace (IBM Rational XDE)
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Design patterns community Workshops at major conferences
OOPSLA – http://oopsla.acm.org ECOOP – http://www.ecoop.org ICSE – http://www.icse-conferences.org
Lots of publications in different journals E.g.
http://www.research.ibm.com/designpatterns/publications.htm
Large Internet-community of users and contributors http://hillside.net/patterns
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Effectiveness does not come easy
ignoranceconsternation
initiation
understanding
familiarity
benefit
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Sample pattern: Command
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Sample pattern: Command Consequences
Command decouples the object that invokes the operation from the one that knows how to perform it
Commands are first-class objects. They can be manipulated and extended like any other object
You can assemble commands into a composite command
It's easy to add new Commands, because you don't have to change existing classes
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Way to process patterns
Many different software processes were created. All of them tried to combine best practices with some fresh ideas
Design patterns have proved their value and it was tempting to apply similar technique to software development processes
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Process patterns
Process patterns describe a proven, successful approach and/or series of actions for developing software
First introduced by Jim Coplien’s paper "A Generative Development-Process Pattern
Language“, 1994
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Literature on process patterns Coplien, J.O. A Generative Development-Process
Pattern Language. Pattern Languages of Program Design, Addison Wesley Longman, Inc., pp. 183-237, 1995
Ambler, S. W. Process Patterns: Building Large-Scale Systems Using Object Technology. New York: SIGS Books/Cambridge University Press, 1998
Ambler, S. W. More Process Patterns: Delivering Large-Scale Systems Using Object Technology. New York: SIGS Books/Cambridge University Press, 1998
Pattern Languages of Program Design Series More on
http://hillside.net/patterns/papersbibliographys.htm
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Process patterns community Conferences and workshops
Conference on Pattern Languages of Programs - http://st-www.cs.uiuc.edu/~plop/
Workshop on Software Development Process Patterns at OOPSLA
http://oopsla.acm.org/fp/files/wor-16.html http://wwwbib.informatik.tu-muenchen.de/
infberichte/2002/TUM-I0213.pdf.gz …
Large Internet-community of users and contributors
http://www.ambysoft.com/processPatternsPage.html
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Why process patterns?
Process engineering benefits Documented experience of software
development process organization Methodology agnostic – can be
applied to whatever methodology you use
Support for process patterns within process engineering tools in future
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Sample pattern: Team per task (Alistair Cockburn, Risk management patterns catalog)
Sensation We are getting distracted here. We are losing precious design cycles
Symptoms The project is not moving forward, even though you think it should be. People
have multiple things to do (as usual). A secondary task is dominating their time, keeping them from moving forward with their primary goal. Possibly, they are spending so much energy switching contexts they cannot get a clear mind to do their main task
Forces On the one hand, if you let them drop any of their tasks, your project will miss an
important date. So you want several tasks moved forward at one time. On the other hand, having people active on these multiple tasks is not working well
Try This Split the team. Sort the activities so that each team has a primary task and set of
activities that are not mutually distracting (designing software and sitting in meetings or answering phone calls are mutually distracting). Arrange it so that each team can focus on its primary task, and each task has a dedicated team member
Counterforce You will eventually have one-person teams. Before then, you may discover that it
is not worth splitting up the task set the team has because the working synergy between people that is lost is more harmful than the dedicated time gained per task
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Some observations
Idea is difficult to capture from first sight
Being too specific makes it harder to reuse
Most of the times can be called “principle” rather than “pattern”
No formal description
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From UML to SPEM
UML is an industry standard for OO modeling
http://www.omg.org/technology/documents/formal/uml.htm
“Pure” UML is not perfect for software process modeling
SPEM – Software Process Engineering Meta-model
http://www.omg.org/technology/documents/formal/spem.htm
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Software Process Engineering Meta-model SPEM is an ordinal UML profile that aids
software process modeling Process structure
WorkProduct, WorkDefenition, Activity, Step Process components
Process, Discipline Process lifecycle
Phase, Iteration
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Conceptual Model
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Why SPEM?
Standardizes a way of expressing any software development process
Can be used with any methodology, tool, framework
Leverages expressiveness and popularity of UML
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Processes that have SPEM-base definition
Rational Unified Process DMR Macroscope IBM’s Global Services Method Unisys QuadCycle …
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Sample SPEM diagram from Rational Unified Process
Requirements Core WorkflowRequirements Core Workflow
System Analyst
Architect
Use-Case Specifier
User-Interface Designer
Find Actors and Use Cases
Prioritize Use Cases
Detail a Use Case
Structure the Use Case Model
Prototype User Interface
Repeat and Iterate
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Tools that support SPEM Iris
Can be used to enact designed process http://www.osellus.com/products/iris.html
IBM Rational Process Workbench Can be used for RUP customization http://www.ibm.com/software/awdtools/rup/workbench
Objecteering/UML Supports SPEM Profile http://www.objecteering.com/products.php
Enterprise Architect Supports SPEM Profile http://www.sparxsystems.com.au/ea.htm
More to appear…
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Process engineering
Step 1
Step 5
Step 4
Step 3Step 2
Step 6Step 7
SPEM Model
Tool that supports SPEM
Set of automatedworkbenches
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Process patterns applied Process engineer creates a process by
combining best practices Software development projects face
some common problems – common solutions exist
Process patterns leverage previous experience
Formal definition of pattern allows for easier incorporation of known solution into new process
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Future of SPEM
SPEM 2.0 is being worked on Alignment with Business Process
Definition Meta-model Process modeling tools that support
SPEM begin to emerge More and more organization use
SPEM to model and engineer their processes
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Process patterns and SPEM
SPEM can be used for description of process patterns like UML is used for description of design patterns
SPEM allows for more formal definition of process and organizational patterns
Process patterns can be described in Gamma-style
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Microsoft Solutions Framework
The Microsoft Solutions Framework (MSF) is a collection of Microsoft's proven practices on managing successful IT projects
Microsoft almost does not market MSF and they are not selling it, instead, they focus on making money using MSF
Similar to Windows or any other product, MSF evolves and matures as long as new versions are released. Initially Microsoft made MSF available in 1994. The latest version of MSF is 3.0
You cannot buy this product from Microsoft, but you still can get it – it’s free. Both whitepapers describing MSF and sample templates for MSF lifecycle deliverables are available on the Microsoft web-site
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Microsoft Solutions Framework Software process used within Microsoft
http://www.microsoft.com/msf (English) http://www.microsoft.com/rus/msf (Russian)
Microsoft Solutions Framework consists of: MSF Team Model MSF Process Model MSF Project Management Discipline MSF Risk Management Discipline MSF Readiness Management Discipline
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MSF Team Model
Communication
Delivering the solution within project constraints
Satisfied customers
Enhanced user effectiveness
Smooth deployment and ongoing operations
Approval for release only after all quality issues are identified and addressed
Building to specification
Program Management
Development
Test
Release Management
User Experience
Product Management
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MSF Process Model
Project plans approved
Scope complete
Release readiness approved
Deployment complete
Vision/scope approved
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MSF Project Management Discipline
Team Leads
Program Management
Product Management
Development
Test
User Experience
Release Management
Quality
Man
agem
ent
Risk M
anag
emen
t
Proc
urem
ent M
anag
emen
t
Comm
unicatio
ns Man
agem
ent
Comm
unicatio
ns Man
agem
ent
Cost M
anag
emen
t
Time
Manag
emen
t
Scope
Manag
emen
t
Inte
gratio
n Man
agem
ent
at overall project level at sub-team level
A bridge between MSF and PMBOK
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MSF Risk Management Discipline
Risk Statement
Risk Database,Risk Concepts and Processes
Identify
LearnLearn
ControlControl
Track and Report
Track and Report
Plan and SchedulePlan and Schedule
Analyze and
Prioritize
Analyze and
Prioritize
Risk Assessment Document
Top n Risks
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MSF Readiness Management Discipline
DefineDefine
Knowledge,Skills,
Abilities
Knowledge,Skills,
Abilities
ChangeChange
AssessAssess
EvaluateEvaluate
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Our agenda Introduction
From design patterns to process and organizational patterns
From UML to SPEM Microsoft Solutions Framework
Process patterns in MSF Living document Reenterable process Smart lifecycle Stakeholder-oriented organization
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MSF in SPEM
Many software processes were described using SPEM
Formal definition of the process can be used to generate tool for supporting that process
MSF is an “agile” process – can SPEM be used to model “agile” processes?
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Our project Create a formal description of MSF
in SPEM Find out whether SPEM is applicable
to modeling of “agile” processes Extract process patterns from MSF
model in SPEM Give general description of
discovered process patterns
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Our project Started in December 2003 We used Enterprise Architect with SPEM
Profile to create a model of MSF About 20 diagrams define project team
structure and different disciplines/processes More than 10 ProcessRoles and more than
15 ProcessPerformers associated with more than 20 WorkDefinitions
A separate report on SPEM model of MSF is being worked on
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The same process from different points
Different diagrams can be used to describe same process
Not only shown transitions are allowed
Different perspectives of same process give better understanding
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Patterns discovered
Living document Reenterable process Smart lifecycle Stakeholder-oriented organization
Other MSF-based patterns are to be discussed in further presentations …
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MSF-based process patterns
Living document
Reenterable process Smart lifecycle Stakeholder-oriented organization
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MSF Project LifecycleMaster Project Plan
Th
is s
hou
ld b
e
3D
-dia
gra
m.
Wh
y?
Take
a look
at
slid
es
46
-47
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MSF Risk Management Discipline
Th
is s
hou
ld b
e
3D
-dia
gra
m.
Wh
y?
Take
a look
at
slid
es
46
-47
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Déjà-vu – we’ve already seen that…
Last two diagrams look very similar – it is reasonable to expect common rationale behind them
It is a pattern!!! A closer look at the models we
created allowed us to identify some more patterns
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Living document (UML)
Step 1
Step 2
Document
Step 3
Document
Step 4
Document
Document
Step 5
Step 6
Step 7
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Living document (SPEM)
Step 1
Step 5
Step 4
Step 3Step 2
Step 6
Step 7
DocumentDocument
Document
Document
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Living document Intent
To make sure important decisions can be baselined as early as possible and frozen as late as possible
Motivation Very often document created once as output
of certain step of process is seen as stale and changes to the document are not appreciated. This prevents project team from effectively incorporating latest information that affect decisions made earlier
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Rationale
MSF Living Document Baseline early, freeze late
Agile Welcome changing requirements,
even late in development. Agile processes harness change for the customer's competitive advantage
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MSF: Baseline Early, Freeze Late
MSF
DeploymentComplete
DeploymentComplete
Vision/ScopeApproved
Vision/ScopeApproved
Project PlansApproved
Project PlansApprovedScope CompleteScope Complete
Release Readiness Approved
Release Readiness Approved Baseline
Fre
eze
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Example from XP
Analyse requirement Create Unit Test
Write new code
Unit Test
Test
Refactor code
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MSF-based process patterns
Living document Reenterable process
Smart lifecycle Stakeholder-oriented organization
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MSF Risk Management Discipline
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XP Development Cycle
Analyse Requirement
Test
Create Unit Test
Write New Code
Refactor Code
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Reenterable process (UML)
Step 1
Step 5
Step 4
Step 3
Step 2
Step 6
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Reenterable process (SPEM)
Step 1
Step 5Step 6
Step 4
Step 3Step 2
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Reenterable process Intent
To provide explicit parallelism for process that deals with set of similar artifacts
Motivation When process should be carried out for a set of
similar artifacts (usually we have word “list” in description of artifact) not all of them can be ready to transition to next step. It is reasonable to proceed with each artifact separately but making sure all artifacts go through all process steps
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MSF-based process patterns
Living document Reenterable process Smart lifecycle
Stakeholder-oriented organization
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MSF Process Model
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ORACLE CDM Fast Track
Definition
RequirementsModeling
SystemDesign &
Generation
Transitionto
Production
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Smart Lifecycle (UML)
Step 1
Step 5 Step 4
Step 3
Step 2
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Smart lifecycle (SPEM)
Step 1
Step 2
Step 3
Step 4Step 5
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Smart lifecycle Intent
To provide a possibility of making critical (go/no-go) decisions throughout entire project lifecycle (at the end of each phase)
Motivation Inability to make an important decision that
influences whole project can lead to significant loss of money and time. Closing project at proper time can prevent from further loss of resources invested into project
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Rationale
If project has started it means some resources were invested in it
We may close the project to prevent further loss of money and time
Most often if the project is not going to finish it is closed after first phases
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MSF-based process patterns
Living document Reenterable process Smart lifecycle Stakeholder-oriented organization
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Stakeholders in MSF
“Classic” MSF has 6 role clusters Product Management Program Management Development Testing Release Management User Experience
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Role Cluster
Customer
Stakeholder
External Stake-holder
Sponsor
User
OperationsRelease Management
Development
Testing
Program Management
Product Management
User Experience
Project Team
6
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How does it work? We used “customized” MSF for
courseware development We had 7 role clusters
Program Management Trainer Advocacy Student Advocacy Potential Employer Representative Institutialization Development Testing
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Role Cluster
Stakeholder
External Stake-holder
Development
Testing
Sponsor
Trainer
Student
PotentialEmployer
Potential Employer Representative
Trainer Advocacy
Program Management
StudentAdvocacy
Project Team
7
Academic Facility
Institualization
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Role
External Stake-holder 1
Stakeholder
External Stake-holder
External Stake-holder 2
External Stake-holder N
Role N
Role Y
Role X
Role 2
Role 1
Project Team
Stakeholder-oriented organization
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Stakeholder-oriented organization Intent
To make sure interests of key project stakeholders are taken into account and balanced
Motivation Naturally different stakeholders have
different and often conflicting interests in project and its result. Such organization makes probability of satisfaction of key stakeholders much higher
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Examples from XP
Business people and developers must work together daily throughout the project
The sponsors, developers, and users should be able to maintain a constant pace indefinitely
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Conclusions
High-level formal description of software process leads to discovery of some process patterns
Using SPEM allowed to give Gamma-style definitions to discovered patterns
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Nikita Boyko (Dnepropetrovsk National University, Ukraine)
Alex Dubinsky (Dnepropetrovsk National University, Ukraine)
Andrey Terekhov (Microsoft, Russia) Alex Zverintsev
(eLine Software, Inc., Ukraine/USA) Yevgen Berlyand
(Information Systems Development, Ukraine) Konstantin Runduev
(Dnepropetrovsk National University, Ukraine) Stanislav Petrovsky (ABV Technique, Ukraine)
Our thanks to:
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Stanislav Busygin (University of Florida, USA)
Mariele Hagen(University of Leipzig, Germany)
Vivienne Suen (Osellus, Inc., Canada)
ZEN-Process-Pattern-Team - M. Gnatz, F. Marschall, G. Popp, A. Rausch, M. Rodenberg-Ruiz, W. Schwerin, K. Bergner (University of Munich, Germany)
Stanislav Vonog (Moscow Institute of Physics and Technology, Russia)
Our thanks to:
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This presentation was delivered on March 4, 2004 in Moscow State University (Russia) at the conference “Microsoft Technologies in Computer Science and Software Engineering”
You can download this presentation from: http://www.vlpavlov.com
http://www.microsoft.cs.msu.su/conference http://www.elinesoftware.com
Questions?