Cmpe 589 Spring 2006 Lecture 1

Software Quality  Definable and measurable Quality: –Conformance to requirements, non- conformance is a defect –Fitness for use- meets customer expectations

Software Quality Quality of Design: –Grades/ Models –Customer purchasing power Quality of Conformance –Degree to which the product meets design specification

Software Quality Role of Customer –“Small q” –producer perspective, acceptable product defect rate and acceptable reliability. –“Big Q” – Product quality, process quality, and customer satisfaction

Customer wants and needs Software Quality Requirements specification Products designed and implemented with forms on continuous improvement Good product quality and Good support services Good customer satisfaction Loop Problem of the 90’s

Software Quality Conformance to functionality? –Defect Rate –Reliability –Measure- customer satisfaction Interrelationships Among Software Attributes Measures Models

Software Quality Total Quality Management (TQM) Total Quality Management (TQM) Continuous Improvement Customer Focus Process Improvement Human side quality Metrics, Models, Measurement and Analysis

Software Quality Plan-do-check-act: feedback loop and statistical quality control Quality Improvement Paradigm: internal assessment of company goals and status –Characterize product and its environment –Set goals –Choose appropriate processes –Execute Processes –Analyze Data –Package Expertise for Reuse

Software Quality S.E.I – Capability and Maturity Model –Stage process improvement – 1-5 stages –Library of repeatable processes –Defect prevention –Technology innovation –Process change methodology Lean Enterprise Model –Concentrate on value added activities –Eliminate non-value added activities

Software Quality Ethical Basis for Quality –Technical Issues –Professional Issues –Social Issues