EvolutionofSoftwareSystemQualitySecondAsia-Pacific.pptVIP

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EvolutionofSoftwareSystemQualitySecondAsia-Pacific.ppt

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EvolutionofSoftwareSystemQualitySecondAsia-Pacific

26 SEP 00 ver 4 FOUO Definition QUALITY is the characteristic that distinguishes the grade of excellence or superiority of a process, product, or service. In general usage, QUALITY means different things.Meaning of QUALITY varies considerably across specific disciplines and applications. Historical Aspects of QUALITY Evolution Edward Deming Postulated Statistical QUALITY Control Principles Famous 14 Points of QUALITY Management A Subset of these Principles successfully adapted by Japanese Manufactures William Crosby Emphasized Humanistic Behavioral Aspects of QUALITY Improvement Becoming More Important Now Juran QUALITY Trilogy A. QUALITY Planning Set of QUALITY Goals Set Plans for Operations Based on these Goals B. QUALITY Control Responsible for Meeting QUALITY Goals Prevent Adverse Changes Set and Observe Performance Measures Compare with Industry Standards Benchmarking Compare with Deming, CMM C. QUALITY Improvement Moving from Current Level to the Next Higher Level Organize Teams, Train Operators to identify and Correct QUALITY Problems Six Sigma Initiatives GE and Motorola Recognized Widely by Manufacturing Industry Adopted in Various Ways by Software Industry Major Results Total QUALITY Management (TQM) ISO Certification Malcolm Baldridge Nation of QUALITY Award (Dept. of Commerce) Six Sigma Means no more that 3.4 defects per million opportunities (six standard deviations away from the average of an assumed normal distribution) IBM (late Harlan Mills) Clean Room “follows” this Metric Perspectives on QUALITY (Garvin 1984) Transcendented View Something we recognize but cannot define EXAMPLE: Beauty, Aristotles Concept of Form User View Fitness of Purpose Manufacturing (Design) View Conformance to Specification Product View Tied to inherent product functions and characteristics Value-Based View Depends on the price the customer is willing to pay QUALITY Models McCall’s QUALITY Model (1977) Shows relationships between external QUALITY Factors such as correc