CSC302H1 Lecture Notes - Lecture 16: Ex-Gay Movement, Quality Records, Software Configuration Management

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12 Jan 2016
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Quality assurance products(s) designs, code: verification & validation focuses on the quality of the. Looks at: requirements, models, specifications: qa focuses on the quality of the processes. Does the organization learn from its mistakes: six sigma use statistics to measure defects. 99. 9999% = 6 sigma of the mean on a normal curve. Target of 6 sigma = no more than 1 defective. In practice: allow fro 1. 5 sigma drift in the mean over. Result: 4. 5 sigma = 3. 4 defective parts per part per million long term million. 100 parts device probability of a defective. 10000 parts device probability of a defective. Suggestion: design things w/ fewever device = 0. 0013 device = 0. 04 components errors: quality management for software, facts: All defects are design errors no manufacturing. Process improvement principles still apply: software defect removal. Fix the defects in each product patch buggy code. Prevents similar bug occurances in the future. This is very cost effective: software defect prevention.

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