SE461 PART7.pdf

Benghazi University Faculty of Information Technology Software Engineering Department Software Quality Part7 (Quality Standards) Prepared by: Mohamed A. Elorfi Instructor: Salah ALgnashi  Quality standards Standards are the key to ef...

Benghazi University Faculty of Information Technology Software Engineering Department Software Quality Part7 (Quality Standards) Prepared by: Mohamed A. Elorfi Instructor: Salah ALgnashi  Quality standards Standards are the key to effective quality management They may be international, national, organizational or project standards Product standards define characteristics that all components should exhibit e.g. a common programming style Process standards define how the software process should be enacted Mohamed Elorfi: Software Quality 2 Importance of standards Encapsulation of best practice - avoids repetition of past mistakes Framework for quality assurance process – it involves checking standard compliance Provide continuity - new staff can understand the organisation by understanding the standards applied Mohamed Elorfi: Software Quality 3 Well known quality standards ISO 9000 (International Standards Organization) Standards evolve and improve over time. CMM (Capability Maturity Model) Developed by the SEI. Mohamed Elorfi: Software Quality 4 ISO 9000 standards International set of standards for quality management (ISO 9000:2000, ISO 9001:2000, ISO 9004:2000, etc.) Applicable to a range of organisations from manufacturing to service industries ISO 9001:2000 specifies requirements for a quality management system for any organization that needs to demonstrate its ability to consistently provide product that meets customer and applicable regulatory requirements and aims to enhance customer satisfaction, in all business sectors – ISO 9001 is a generic model that must be instantiated for each organisation ISO 9004:2000 provides guidance for continual improvement of a quality management system to benefit all parties (employees, owners, suppliers, society in general,…) through sustained customer satisfaction. It should be used to extend the benefits obtained from ISO 9001:2000 to all parties that are interested in or affected by the business operations. Mohamed Elorfi: Software Quality 5 ISO 9000 certification Quality standards and procedures should be documented in an organisational quality manual External body may certify that an organisation’s quality manual conforms to ISO 9000 standards (namely ISO 9001) Customers are, increasingly, demanding that suppliers are ISO 9000 certified Mohamed Elorfi: Software Quality 6 ISO 9000 certification ISO 9000 standards are documentation based: Every aspect of every step of every process must be backed up with formal document in a precisely defined format keeping records of how processes are applied. Standards are complex, detailed and stringent. ISO 9000-3 specifies 20 elements to be assessed. Most companies (60-70%) fail the ISO audit the first time. Most companies are deficient in corrective actions and document control. Companies take steps to meet the standards in these areas and get certified the second try. Mohamed Elorfi: Software Quality 7 ISO 9000 and quality management An organization that have SQA tasks in place and a quality management process would have most of ISO elements Ideally quality management should be separate from project management This is to ensure quality considerations are not compromised by concerns of budget and schedule Mohamed Elorfi: Software Quality 8 CMM standard Is a model for judging the maturity of the software processes of an organization. identifying the key practices that are required to increase the maturity of these processes. Assessment uses an 85 items questionnaire. The model consists of 5 levels Level 5 Optimizing Le vel 4 Managed Level 3 Defined Le vel 2 Repeatable Level 1 Initial Mohamed Elorfi: Software Quality 9 CMM levels 1) Initial. The software process is characterized as ad hoc, and occasionally even chaotic. Few processes are defined, and success depends on individual effort and heroics. 2) Repeatable. Basic project management processes are established to track cost, schedule, and functionality. The necessary process discipline is in place to repeat earlier successes on projects with similar applications. 3) Defined. The software process for both management and engineering activities are documented, standardized, and integrated into a standard software process for the organization. All projects use an approved, tailored version of the organization's standard software process for developing and maintaining software. 4) Managed. Detailed measures of the software process and product quality are collected. Both the software process and products are quantitatively understood and controlled. 5) Optimizing. Continuous process improvement is enabled by quantitative feedback from the process and from piloting innovative ideas and technologies. Mohamed Elorfi: Software Quality 10 CMM & ISO 9000 There is a clear correlation between the key processes in the CMM and the quality management processes in ISO 9000 The CMM is more detailed and prescriptive and includes a more detailed framework for improvement Organisations rated as level 2 in the CMM are likely to be ISO 9000 compliant Mohamed Elorfi: Software Quality 11