Mumbai University > Information Technology > Sem6 > Software Engineering

Marks: 10M

Year: Dec 2015

ReEngineering :

• Restructuring or rewriting part or all of a system without changing its functionality
• Applicable when some (but not all) subsystems of a larger system require frequent maintenance
• Reengineering involves putting in the effort to make it easier to maintain
• The reengineered system may also be restructured and should be re-documented

When do you decide to reengineer?

• When system changes are confined to one subsystem, the subsystem needs to be reengineered
• When hardware or software support becomes obsolete
• When tools to support restructuring are readily available

Re-Engineering Process:

Economics of Reengineering:

• Cost of maintenance = cost annual of operation and maintenance over application lifetime
• Cost of reengineering = predicted return on investment reduced by cost of implementing changes and engineering risk factors
• Cost benefit = Cost of reengineering - Cost of maintenance

Re-engineering advantages:

Reduced risk

• There is a high risk in new software development. There may be development problems, staffing problems and specification problems

Reduced cost

• The cost of re-engineering is often significantly less than the costs of developing new software

The complete Software Re-Engineering lifecycle includes:

• Product Management: Risks analysis, root cause analysis, business analysis, requirements elicitation and management, product planning and scoping, competitive analysis
• Research and Innovation: Definition of a problem, data gathering and analysis, identifying a solution and developing best-of-breed or innovative algorithms, verification of quality for data and results, patent preparation
• Product Development: Technology analysis and selection, software architecture and design, data architecture, deployment architecture, prototyping and production code development, comprehensive software testing, data quality testing, and product packaging and deployment preparation
• Product Delivery and Support: Hardware/Platform analysis and selection, deployment and release procedures definition, installations and upgrades, tracking support issues, organizing maintenance releases.
• Project Management: Brings efficiency and productivity to your software re-engineering project by utilizing modern, practical software project management, software quality assurance, data quality assurance, and advanced risk management techniques.