The ROI from Software Quality

Introduction Profiting from Defects Losing from Defects Investing in Quality The Benefits of Software Quality Practices Using Return-On-Investment (ROI) Analysis Measuring Software Quality Definition of Quality Types of Defects The Defect Life Cycle Defect Undercounting Interpreting Defect Counts Defects and Corporate Evolution Defect Classification Software Quality Practices Software Inspections Risk Assessment Using Metrics Test-Driven Development Automatic Defect Detection Other Practices The State of the Practice Quality Assurance (QA) Function Metrics Testing Software Inspections Tools Limitations A Software Quality Benchmark Data Sources Benchmarks Summary Quality and the Cost of Ownership A Definition of Customer Costs Savings from Higher-Quality Software Benchmarking Customer Costs Discussion Quality and the Cost to Developers Project Costs The Payoff from Cost Reductions Reducing Rework Costs Quality and Profitability Product Positioning Revenue and Quality Quality and Profit Improving Productivity Calculating Return-On-Investment Cost Savings Schedule Benefits The ROI Evaluation Process Discounting Uncertainty and Sensitivity Analysis Subjective Distributions Interpreting the ROI Values Payback Period Example ROI Calculations Context Introducing Code Inspections Evaluating Code Inspections after Deployment Automatic Defect Detection Tools Risk Assessment Test-Driven Development Multiple Practices The Quality of Open Source Software Adoption of OSS The OSS Advantage The Cost of Adopting OSS Comparing OSS and CSS Software Reliability Comparing OSS and CSS on Security Making the Business Case Wariness about Initial Investments Length of Payback Period Hardware Culture Software Culture Time-to-Market Is King Summary APPENDICES A Definition of Application Domains Military Software Systems Software Commercial Software MIS (Management Information Systems) B Overview of the Data Sets The ISBSG Data Set The MIT Data Set C The Effectiveness and Efficiency of Software Inspections Effectiveness of Defect Detection Activities Average Effort per Defect D Backfiring Table E The ROI Model Definitions Defect Detection Stages The Customer Cost Savings Model The Financial ROI Model Schedule ROI Defaults Illustration Assumptions and Limitations F Evaluating Schedule Reduction G Expecting and Interpreting Evidence The SW-CMM Example Evidence in Software Engineering

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