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School of Engineering and Information Technology

ITECH3501-6501 Principles of Software Engineering

Tutorial Six

System Manufacturing and Administration

Marks 1


1. What technical means exist to prevent or deter illegal copying (piracy) of software?
The following technical means exist to prevent illegal copying of software are:-
- Object code only
- check for machine identification
- check for software license
- encoding and encryption
- watermarking

2. Why does the complexity of a program increase during maintenance and what can be done about it?
The complexity of a program increase during maintenance because we add following
functions:-
• Components
• Configurations
• Special cases
• User styles
• New languages
Develop software complexity metrics tailored to the project dependent upon structure of the system being developed. Software complexity is usually measured as a matrix of complexity indicators including seller risk, skillsets required, and time to resolution of incidents, infrastructure complexity, speed of regression testing and end user performance among others. Use of multiple regression techniques to identify units, subprogram that require a reduction in complexity. Planning phases to re-work the software to reduce complexity.





3. What are the advantages of doing maintenance in-house for purchased products?
The advantages of doing maintenance in-house for purchased products are:
- Improve any/all developer-oriented quality criteria: (testability, maintainability, portability, localizability, reusability)
- Change internal structure only (not interfaces)
- Reuse existing material
- Justify by expecting future savings

     
 
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