It is defined as the possibility of failure-free service of a computer program in a specified environment for a specified time period. Can be measured directly and assessed using historical and developmental data (unlike many other software quality factors). Software reliability problems can normally be traced back to errors in design or implementation.
Software reliability metrics
Readability metrics are units of measure for system reliability. System reliability is measured by counting the number of operational failures and relating these to demands made on the system at the time of failure. A long-term measurement program is required to assess the reliability of critical systems.
Define as a software quality assurance activity that focuses on identifying potential hazards that may cause a software system to fail. Early identification of software hazards permits developers to define design features to can drop or at least control the impact of potential hazards. Software reliability includes determining the possibility that a failure will occur, software safety checks how failures may result in conditions that can lead to a mishap.
Mistake proofing software
Poka-yoke devices are tools that lead to the prevention of a potential quality problem before it occurs or to the Fast detection of a quality problem if one is offered. Poka-yoke devices are simple, cheap, what are the engineering process, and are located near the process task where the mistakes occur.
ISO 9000 quality standards
Quality Assurance systems are defined as organizational structure, responsibilities, procedures, processes, and resources for implementing quality management. Quality Assurance systems are built to ease organizations to ensure their products and service's safety customer expectations by reaching their specification.
These systems a commercial wide variety of activities encompassing a product's entire life cycle including planning, controlling, measuring, testing, and reporting. The ISO 1000 standards were adopted by many countries including all members of the European community, Canada, Mexico, and the US, etc. ISO 9000 defines the quality elements that must be being for a quality assurance system to be compliant with the standard. ISO 9001 is the quality standard that accommodates 20 requirements that must be commenced in an effective software quality assurance system.
The SQA plan
The SQA plant provides a road map for instituting software quality assurance. Developed by the SQA group, the plan serves as a template for SQA activities that are instituted for each software project.
The initial section describes the purpose and scope of the document and indicates those process activities that are covered by quality assurance. All documents noted in the SQA the plan are listed and all applicable standards are noted.
The management section of the design defines SQA's program in the organizational structure, SQA tasks activities, and their placement throughout the software process.
The document section describes each of the work product producers as part of the software process. It also defines the minimum set of work products that are acceptable to achieve high quality.
The Standard, practices, and conventions section lists all applicable standards and practices that are replied to during the software process.
The Reviews and audits section of the plan classifies the reviews and audits to be conducted by the software engineering team and the customers. It provides an overview of the approach for each review and audit.
The test section references the software test strategy and system. It also defines test Record Keeping requirements. Problem reporting and corrective action define procedures for reporting, tracking, and resolving errors and defects and identify the organizational responsibilities for these activities.
The remains of the SQA plan recognizes the tools and techniques that
Software quality assurance Software quality is described as conformance to explicitly state functional and performance requirements, explicitly documented standards and implicit features that are anticipated of all professionally developer software ... Read More
A tunnel establishes a virtual pipe for data packets between a tunnel entry and a tunnel endpoint. Packets entering a tunnel are forwarded inside the tunnel leave the tunnel unchanged. Tunneling, that is, sending a packet through a tunnel, is achieved by using encapsulation ... Read More
The overall structure of the software components and how the success provides a conceptual integrated file system. In other words, architecture is the hierarchical structure of program components, how these components interact, and the structure of data that are used by the components ... Read More
Real-time and distributed system design The real-time system is a software system the correct functioning of the system depends on the results produced by the system the time at which these results are produced ... Read More
Waterfall Model The waterfall model also called classic life cycle requirements is well defined and stable. It suggests a systematic, sequential approach to software development. It begins with customer specification of requirements and processes through planning, modeling, instruction, and deployment ... Read More
Software Design A software design is an essential engineering description of some software product that is to be established. A design can be determined to the customer's requirements and can be assessed for quality against predefined patterns ... Read More