Software Quality Assurance II Due today: Detailed Design Document I Next Class:Pressman 20; Quiz #2 Questions? / Team Status Reports Continuous Improvement (cont.) SQA in the real world Bio Break ( 5 minutes ) More SQA in the Real World Quiz #2 Review

Success Factors for Effective Continuous Improvement Feedback & Communication –Assessment Results Take Action on most important issues –Prioritize issues –Formulate action plans –Execute actions Re-assess results of actions

Assessment of this Class On a blank piece of paper, please do the following (anonymously): 1.Describe at least one area where Craig is doing well? 2.Describe at least one area where Craig could improve ? 3.Rate Craig’s overall performance on a 1-5 scale (1=poor, 5= excellent). 4.Rate your overall satisfaction with the course on a 1-5 scale (1=very dissatisfied, 5= very satisfied).

Results: Numerical Ratings Overall Rating Craig: 4.4 –Standard deviation: 0.48 Overall Rating Course: 4.6 –Standard deviation: 0.75

Results: Craig – Strengths & AFIs Strengths (n=30) Real world examples/applications (40%) Good / clear lectures (33%) Involves class (13%) Good overheads (10%) Highlights book sections in lecture (3%) AFIs (n=18) Clarify / highlight quiz material (39%) Post detailed lecture notes on web (11%) Change homework each week (6%) More graphics in slides (6%) More real world examples (6%) Add guest lectures (6%) Slow down class (6%) Keep class moving faster (6%) More time on architecture (6%) Get more involved with projects (6%) Unrealistic schedule for 1 st demo (6%)

Action Plan

More SQA in the Real World #1 Motivation for SQA Efforts #5 IBM’s “Train Process” #6 Rigorous Code & Design Reviews #8 Defect Prevention Process (DPP)

Secrets of Software Quality 25JAIIO Craig Kaplan, Ph.D. I.Q. Company 1

20% Savings on Service Costs Source: Secrets of Software Quality by Kaplan, Clark, & Tang (McGraw-Hill 1995)

56% Increase in Revenue per Employee Source: Secrets of Software Quality by Kaplan, Clark, & Tang (McGraw-Hill 1995)

14% Improvement in Customer Satisfaction Source: Secrets of Software Quality by Kaplan, Clark, & Tang (McGraw-Hill 1995)

46% Reduction in Field Defects Source: Secrets of Software Quality by Kaplan, Clark, & Tang (McGraw-Hill 1995)

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Collapsing the Development Process Business Case Initial Specs. Final Specs. Coding Ext. View Doc. Test Case Dev. Formal Test Business Case Initial Specs. Final Specs. Coding Formal Test Ext. View Doc. Test Case Dev. Reduced Cycle Time

The “Train” Process Release 2.0 Ships on May 1. Feature #1 for Rel. 2.0 Feature #1 Team: Programmer, Tester, Technical Writer

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Typical Defect Depletion Curve DefectsFoundDefectsFound Design Code Unit Formal Ship Test Test +3 Mo. Mo. Mo. 60%40%

Shifting the Defect Depletion Curve DefectsFoundDefectsFound Design Code Unit Formal Ship Test Test +3 Mo. Mo. Mo. 90%10% Reviews & Inspections

Results from IBM Study Hours/Maj Defect spent in Formal Test:

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How DPP Works Centralized data collection and storage tools Ongoing Work Causal Analysis Team Action Team Kickoff Meetings defects suggested actions improvements apply improvements, add feedback

Some DPP Success Factors Need for DPP clear Management commitment DPP education for managers & developers Prioritization by Action Team Rotate Action Team Assignments Administrative support for defect logging Continuous improvement of DPP

Quiz #2 Format / Coverage You are responsible for all of the lectures and reading to date. Format will be the same as Quiz #1: –Multiple choice –Short answer –Essay 1/3 covering material that Quiz #1 covered 2/3 covering new material since Quiz #1

Quiz #2 Review Topics All topics of Quiz #1 review sheet WebE Principles, questions, issues Web UI guidelines Software design model Stepwise refinement Modularity, cohesion, coupling UI – 3 golden rules Task analysis Design issues / principles Data warehouses Data design at the component level Basic Architecture styles/types Cost of quality SPC Defect Prevention Process Inspection and reviews SQA metrics Quality standards Continuous Improvement SQA real-world applications Change Control process All questions on Quiz #1