SQA
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This document discusses software quality assurance and parameters. It defines software quality as how well software meets requirements. Software quality has two categories: functional quality related to user requirements, and non-functional quality related to structural requirements. Quality control ensures products meet standards, while quality assurance prevents defects. Cost of quality quantifies quality costs. Software quality parameters include testability, usability, understandability, consistency, efficiency, effectiveness, accuracy, maintainability, reliability, portability, security and robustness. The document also discusses ISO quality standards including ISO 9001 for software engineering quality assurance systems.
SQA
- 1. SOFTWARE QUALITY ASSURANCE, QUALITY PARAMETER
- 2. Software Quality • Software quality is the characteristic of the software that defines how well the software meets the customer requirements, business requirements, coding standards etc.
- 3. Two Categories Software Quality • Software Functional Quality: characteristics that define how well the software meets functional requirements, and how well it satisfies the end-users. • Software Non-Functional Quality: characteristics that define how well structural requirements are met that support the delivery of functional requirements. It is usually related to software code and internal structure.
- 4. Quality Control • Quality control (QC) is a procedure or set of procedures intended to ensure that a manufactured product or performed service adheres to a defined set of quality criteria or meets the requirements of the client or customer.
- 5. Quality Assurance • Quality assurance (QA) is a way of preventing mistakes or defects in manufactured products and avoiding problems when delivering solutions or services to customers
- 6. Cost of Quality • In process improvement efforts, quality costs or cost of quality is a means to quantify the total cost of quality- related efforts and deficiencies
- 7. Issues • The following differences highlight some of the issues in taking the manufacturing QA model and applying it to software development. 1∙ The manufactured product is a physical realization of the customer requirements. 2∙ The function of the product can be verified against this physical realization. 3∙ The costs of manufacture, including rework, repairs, recalls etc., are readily categorized and visible. 4∙ The benefit of the product to its usercustomer are readily categorized and visible.
- 8. Software Quality Parameters • Testability • Usability • Understandability • Consistency • Efficiency • Effectiveness
- 9. Software Quality Parameters (Cont) • Accuracy • Maintainability • Reliability • Portability • Security • Robustness
- 10. THE ISO 9000 QUALITY STANDARDS The ISO Approach to Quality Assurance Systems ISO 9000 describes the elements of a quality assurance system in general terms • structure • procedures • processes • resources
- 11. The ISO 9001 Standard • ISO 9001 is the quality assurance standard that applies to software engineering. the ISO 9001 standard is applicable to all engineering disciplines, a special set of ISO guidelines (ISO 9000-3) have been developed to help interpret the standard for use in the software process.