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CS605 - Software Engineering II - Lecture Handout 39

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Environment Assessment

The legacy system also needs to be assessed from an environment’s perspective. This involves looking at the supplier, failure rate, age, performance, support requirements, maintenance cost, and interoperability.

These angles are elaborated in the following paragraph:

Supplier stability: Is the supplier still in existence? Is the supplier financially stable and likely to continue in existence? If the supplier is no longer in business, is the system maintained by someone else?

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CS605 - Software Engineering II - Lecture Handout 30

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Statistical Software Quality Assurance

Statistical SQA is a technique that measures the quality in a quantitative fashion. It implies that information about defects is collected and categorized and an attempt is made to trace each defect to underlying cause. It uses Pareto Principle to identify vital causes (80% of defects can be traced to 20% of causes) and moves to correct the problems that have caused the defects.

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