CIS 210 Systems Analysis and Development

1
CIS 210Systems Analysis and Development

• Week 9 Part I
• Maintaining Information Systems

,
2
Objectives

• Upon completion of part I you will be able to
• Understand and be able to explain the concepts
  related to the four primary types of maintenance
• Understand and be able to explain the concepts
  related to the cost of maintaining information
  systems
• Understand and be able to explain the concepts
  related to the role of CASE when maintaining
  information systems

3
Overview

• System Maintenance
• Largest expenditure
• Begins directly after installation
• Software changes
• Hardware changes
• Changes in procedures
• How long to maintain?
• Issues to consider

4
Maintaining Information Systems

• The Maintenance Process
• Obtaining requests
• Transforming requests into changes
• Designing changes
• Implementing changes
• Deliverables and Outcomes
• New versions of software
• New versions of documentation

5
Conducting Systems Maintenance

• Types of Maintenance
• Corrective
• Adaptive
• Perfective
• Preventive
• Cost of Maintenance
• Maintainability
• Latent defects
• Number of customers
• Quality of system documentation
• Maintenance personnel
• Tools
• Well-structured programs

6
Conducting Systems Maintenance

• Managing Maintenance
• Managing maintenance personnel
• Measuring maintenance effectiveness
• Number of failures
• Time between failures (MTBF)
• Type of failure
• Controlling maintenance requests
• Configuration management
• System librarian
• Baseline modules
• Build routines

7
Website Maintenance

• Special Issues
• Continuous operation
• Broken links
• HTML validation
• Re-Registration
• Future editions

8
Summary

• The maintenance process
• Deliverables and outcomes
• Types of maintenance
• Cost of maintenance
• Managing maintenance
• Website maintenance