Software Maintenance : A Tutorial - Keith H.Bennett K ith H B tt - - PowerPoint PPT Presentation

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Software Maintenance : A Tutorial - Keith H.Bennett K ith H B tt - - PowerPoint PPT Presentation

Dec 19, 2022 482 likes •823 views

Software Maintenance : A Tutorial - Keith H.Bennett K ith H B tt 200310642 OVERVIEW OVERVIEW PART 1 PART 1 The rapid increase in the size p Multimillion-line 100-line 45 YEARS AGO NOW Evolving such

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Software Maintenance : A Tutorial K ith H B tt

  • Keith H.Bennett

컴퓨터시스템 200310642 최 종 우

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OVERVIEW OVERVIEW

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PART 1 PART 1

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The rapid increase in the size p

Multimillion-line 100-line 45 YEARS AGO

NOW

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E l i h t t t

  • Evolving such system to meet

continually changing user continually changing user needs is difficult because of complexity.

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What is software maintenance? What is software maintenance?

  • IEEE definition :
  • modifying

i f

  • improve perfomance

adapt to a change

  • adapt to a change
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maintenance maintenance

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Should not be degraded Should not be degraded Reliability i i bili Maintainability

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PART 2 PART 2

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Ripple effect Ripple effect

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problems problems

1 2 3 1 2 3

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Th li t ith The alignment with Organizational Objectives Organizational Objectives : time and budget

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P i Process issues

: additional activities

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T h i l i Technical issues

: be still not available

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l ti solutions

1 2 3 1 2 3

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Not technical, but manageral requires financial investment requires financial investment

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Solution 1. COCOMO techniques

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Process management Process management : to develop a product

  • r perform a service
  • r perform a service
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Solution 2. 4 keys stages 1 Help desk

  • 1. Help desk
  • 2. Analisys
  • 3. Implementation

4 Release

  • 4. Release
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necessary to determine the t f ki h cost of making a change

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  • 1. user-expressed problem

p p 2 l lti

  • 2. several soultions
  • 3. make a decision
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All ripple effect must be investigated All ripple effect must be investigated.

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PART 3 PART 3

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Legacy system Legacy system

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  • ld
  • ld

heavily modified heavily modified BUT, BUT, still doing useful work g

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Reverse engineering Reverse engineering

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T id h l i To provide help in program h i comprehension

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summary summary

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h i f i ? What is software maintenance?

  • IEEE definition :
  • modifying

f

  • improve perfomance

adapt to a change

  • adapt to a change
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  • Software maintenance and the
  • rganization

d l

  • Process models
  • Technical Issues
  • Technical Issues
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  • Legacy System
  • Reverse Engineering

g g

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Software Maintenance : A Tutorial

  • Keith H.Bennett