s-cube lp: service adaptation: a maintenance process ?
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Service Adaptation: A Maintenance Process ?
Ita Richardson, Stephen Lane
(research partners – VUA, FBK)
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2
Where
are
services
used?
Do we care
how they are
developed &
implemented
Should we
be
concerned
about
building
in quality?
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Motivation
• Adaptation is a very large part of the Service Based
Application (SBA) Life-Cycle
• Services may need to adapt when composed into more
complex compositions.
• When services adapt in safety critical applications it is vital
that quality is maintained during adaptation.
• Certain sectors have regulatory requirements which
require software development to follow a particular
software process.
• e.g. Medical Device, Automotive, Financial ……
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Context
• This work focuses on creating an optimised process for
developing adaptable SBAs.
• The work builds on the reference life-cycle developed bu
S-Cube in JRA-1.1.2
• This process should be used when implementing
monitoring and adapting mechanisms of adaptable SBAs.
• Following this process allows an SBA to react to Quality of
Service issues.
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Identified adaptation activities from the
literature.
Objectives:
1.Identify adaptation related activities from software and
service engineering literature.
2.Map them to the S-Cube life-cycle, creating an adaptation
process model.
Results:
18 Adaptation activities from service engineering literature
13 Adaptation support activities from maintenance standards
Lane and Richardson, 2011
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Methodology
• Identify high-level adaptation activities from previous S-Cube deliverables and map them to the S-Cube life-cycle.
• Identify adaptation practices from existing service literature and map them to the S-Cube life-cycle.
• Identify adaptation practices from maintenance process literature and map them to the S-Cube life-cycle.
Lane et al. (under review)
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Phase I
• Evaluated 16 existing approaches for developing SBAs.
• Created a list of adaptation activities from the approaches
that make reference to adaptation related activities.
• Mapped adaptation activities into the appropriate phases
of the S-Cube reference life-cycle.
• Identified gap in existing approaches.
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Phase II
• Review software maintenance literature for suitable
adaptation related activities.
• ISO/IEC 14764 used as the dedicated maintenance
process.
• Categorised practices from ISO/IEC 14764 as either
suitable or not suitable for service adaptation.
• Mapped suitable maintenance practices to appropriate
phases of S-Cube reference life-cycle.
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Conducted Systematic Literature Review of
process models for developing and adapting
SBAs.
Objectives:
1.Identify SBA development approaches and create SBA
development process meta-model.
2.Identify development approaches that support adaptation.
Results:
57 Studies with SBA development process models
9 Studies facilitate SBA adaptation
Lane and Richardson, 2011
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13
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SLR Results
Based on the results of the SLR there were seven
publications which explicitly support adaptation, while the
others contained some processes and activities that would
be useful for the adaptation of SBAs.
Existing SBA processes focus on Service Implementation -
often technological or implementation aspects of a task
We are interested in the process-focus
How can we assure the quality of the process during
development?...... Repeatable process
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Process Reference Model for Adapting
Service-Based Applications
•Expert Opinion Survey
•10 interviews
•Case Study
•Chief Technology Officer, Business analyst, Developer
•Data Analysis
•Content analysis – coding and clustering
•Evaluation
•SBA development life-cycle
•Component- based process model
Lane et al (under review)
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Conclusion
• Defined low level practices that should be considered
when carrying out service adaptation.
• Many existing service development approaches do not
make reference to adaptation.
• Traditional maintenance theory contains many practices
that can be exploited for service development.
• Developed adaptation process model based on
adaptation data from the literature and the field.
• Initial validation of model complete
• Subsequent validations need to be completed
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References
Stephen Lane, Antonio Bucchiarone and Ita Richardson, A
Process Reference Model for Developing Adaptable
Service-Based Applications (under review)
Stephen Lane, Qing Gu, Patricia Lago and Ita Richardson,
Adaptation of Service-Based Applications: A Maintenance
Process? (under review)
Stephen Lane and Ita Richardson, 2011, Process Models for
Service-Based Applications: A Systematic Literature
Review, Information and Software Technology
(forthcoming)
Eoin Whelan – UCBL, Madrid, 29/09/2009 © S-Cube – 24
Thank you and…...Questions?
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