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Metrics and Verifying Software - A Guide by Paul E. Black

In this guide by Paul E. Black from NIST, discover secure SCADA systems, FDA approval archetypes, and metrics for software quality. Learn about society's options with failing software and the importance of version tracking.

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Metrics and Verifying Software - A Guide by Paul E. Black

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  1. Metrics & Verifying Software Paul E. Black National Institute of Standards and Technology http://www.nist.gov/ paul.black@nist.gov

  2. Candidate Software • Secure SCADA Reference Implementation • Supervisory Control And Data Acquisition systems measure and control infrastructure for electricity, oil, gas, water, etc. • Rigorously specified and thoroughly tested • Medical Infusion Pump • Many models from many universities, etc. • An archetype of FDA approval process • Open source software: Apache, Linux, etc. • Change revision history available Paul E. Black

  3. Reminders • Be willing to set aside your favorite method, tool, approach, … • “To a man with a hammer, every problem looks like a nail.” • Parable of the street light • This will take lots of good, hard work • Generally applicable tools take 3x longer • Integrated tools take 3x longer again • Brooks, “Mythical Man Month” • Little of this is considered publishable Paul E. Black

  4. Useful Metrics • A measure is an objective attribute • A metric is higher-level or more subjective • Measures are bases for metrics: faults/LOC approximates quality • Careful version tracking is essential • Reports (problems or certificates) should be traceable to particular entities (specifications, version, module, …) Paul E. Black

  5. Society has 3 options: • Learn how to make software that works • Limit size or authority of software • Accept failing software Paul E. Black

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