What/Whay is Software Maintenance Importance Catagories of Maintenance Maintenance Agreement Challengers Software Maintenance Life Cycle(SMLC)

1. Software
Engineering L9
Sameera
Gunathilaka
Lead Software
Engineer
ERP Technical
Consultant
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2. IT1204 – Software Engineering Institute of Technology,
University of Moratuwa 2

3. SDLC –
Waterfall
Model
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4. IT1204 – Software Engineering Institute of Technology,
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5. What is
Software
Maintenance
• Changes to the software or service after delivery
• Software’s evolution through upgrades
• Last longer than development
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6. IEEE 1219
– IEEE
Standard
for SM
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7. Why is
Software
Maintenance
• To fix bugs
• To implement enhancements
• To increase non-functional qualities( securities,
performance)
• To decrease complexity
• To make it work in new environment
• Delete Retired functionalities
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8. Categories of
Software
Maintenance
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• rectify some bugs observed while the system is in use, or
to enhance the performance of the system.
Corrective maintenance:
• modifications and updating when the customers need the
product to run on new platforms, on new operating
systems, or when they need the product to interface
with new hardware and software.
Adaptive maintenance:
• support the new features that the users want or to
change different types of functionalities
Perfective maintenance:
• modifications and updations to prevent future problems
of the software
Preventive maintenance:

9. Software
Maintenance
Agreement
•Scope ( priority base/ resolution base/
Time base)
•Transition, SLA, incident management
•Software maintenance process
•Roles and responsibilities
•Cost estimation
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10. Challenges in
Maintenance
• Priorities, Rates of requests
• Team instability, low skills
• Limited knowledge on the software code
• Limited domain knowledge, testing issues
• Quality of source code
• Lack of documentation
• Limited access to original developers
• Incorrect or incomplete impact analysis, process issues
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11. Software
Maintenance
Life Cycle
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12. Problem identification
phase
IT1204 – Software Engineering Institute of Technology, University of Moratuwa
• Modification request
comes
• Create the support case
• Inform the customer we
have created a support
case
• Identify the priority
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13. Analysis phase
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• Check the issue in Local
environment
• Determine modification
elements
• Derive solution
• Identify the resolution
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14. Design phase
•Design the changes
•Check the design is not
affecting working flows
•Develop test cases
•Inform the design and
solution
•Plan the implementation
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15. Implementation phase
IT1204 – Software Engineering Institute of Technology, University of Moratuwa
•Coding
•Unit testing
•Code review
•Standards check
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16. System test phase
•Testing the solution
•Testing other impacted
areas
•Move the implementation
to customer test
environment
•Create documents
•Inform the customer to test
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17. Acceptance
test phase
• Send the test document to testers
• Assist customer representative to test
• Check whether the requested issue is
fixed
• Get the acceptance of the fix
• Get the confirmation to deliver
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18. •Deploy the changes to
customer environments(PROD)
•Keep the version control
•Provide the deployment
documents
•Close the support case
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19. Thank you
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