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Maintenance Metrics and Measures (M 12)

Maintenance Metrics and Measures (M 12). Steve Chenoweth CSSE 375, Rose-Hulman Based on Don Bagert’s 2006 Lecture. Today. How’s the project going? Start testing Thursday? Maintenance Metrics & Measures - this. Right – Lord Kelvin. Outline. Definitions Measurement Procedure Integrity

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Maintenance Metrics and Measures (M 12)

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  1. Maintenance Metrics and Measures(M 12) Steve Chenoweth CSSE 375, Rose-Hulman Based on Don Bagert’s 2006 Lecture

  2. Today • How’s the project going? • Start testing Thursday? • Maintenance Metrics & Measures - this Right – Lord Kelvin

  3. Outline • Definitions • Measurement Procedure Integrity • Measurement/Metric Objectives • Measurement and Metric Examples • Goal-Question-Metric Method

  4. Definitions • Measurement – The processing of formally encoding of an attribute of some entity • For example, the height of a person • Measure – The measurement value • Metric – Can be the same as a measure, but is usually used when more than one measure is involved (this is slightly different than the textbook’s definition)

  5. Measurement Procedure Integrity • A measurement procedure should be • Empirical: Can be verified through experiments or observation • Objective: Without bias or ambiguity • Encodable: Can express using symbols such as number

  6. Measurement/Metric Objectives • Evaluation • Control • Assessment • Improvement • Prediction

  7. Measurement & Metric Examples • Measurement examples • Size • KLOC (thousands of lines of code) • Complexity • McCabe’s Metric (cyclomatic complexity) • Metric examples • Defects per KLOC • Test cases verified per hour

  8. Goal-Question-Metric (GQM)Method (Not in Text) • One source of information: • http://wwwagse.informatik.uni-kl.de/pubs/repository/basili94b/encyclo.gqm.pdf. A short example: • Goal: To maximize customer support satisfaction • Question: Are there are consistent problems with the software? • Metric: Number of problem reports generated per day → →

  9. Do Quiz Exercise 4

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