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Maintainability
In engineering, maintainability is the ease with which a product can be maintained to: * correct defects or their cause, * Repair or replace faulty or worn-out components without having to replace still working parts, * prevent unexpected working conditions, * maximize a product's useful life, * maximize efficiency, reliability, and safety, * meet new requirements, * make future maintenance easier, or * cope with a changing environment. In some cases, maintainability involves a system of continuous improvement - learning from the past to improve the ability to maintain systems, or improve the reliability of systems based on maintenance experience. In telecommunication and several other engineering fields, the term maintainability has the following meanings: * A characteristic of design and installation, expressed as the probability that an item will be retained in or restored to a specified condition within a given period of time, when the maintenance is performed by prescribed p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ISO/IEC 9126
ISO/IEC 9126 ''Software engineering — Product quality'' was an international standard for the evaluation of software quality. It has been replaced by ISO/IEC 25010:2011. The fundamental objective of the ISO/IEC 9126 standard is to address some of the well known human biases that can adversely affect the delivery and perception of a software development project. These biases include changing priorities after the start of a project or not having any clear definitions of "success". By clarifying, then agreeing on the project priorities and subsequently converting abstract priorities (compliance) to measurable values (output data can be validated against schema X with zero intervention), ISO/IEC 9126 tries to develop a common understanding of the project's objectives and goals. The standard is divided into four parts: * quality model * external metrics * internal metrics * quality in use metrics. Quality The quality model presented in the first part of the standard, ISO/IEC 912 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAMS
In engineering, RAMS (reliability, availability, maintainability and safety) Norwegian University of Science and Technology is used to characterize a product or system: * – as ability to perform a specific function and may be given as design reliability or operational reliability. * , – as ability to keep a functioning state in the given environment. * |
McCabe Measure
Cyclomatic complexity is a software metric used to indicate the complexity of a program. It is a quantitative measure of the number of linearly independent paths through a program's source code. It was developed by Thomas J. McCabe, Sr. in 1976. Cyclomatic complexity is computed using the control-flow graph of the program: the nodes of the graph correspond to indivisible groups of commands of a program, and a directed edge connects two nodes if the second command might be executed immediately after the first command. Cyclomatic complexity may also be applied to individual functions, modules, methods or classes within a program. One testing strategy, called basis path testing by McCabe who first proposed it, is to test each linearly independent path through the program; in this case, the number of test cases will equal the cyclomatic complexity of the program. Description Definition The cyclomatic complexity of a section of source code is the number of linearly independent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Repair And Maintenance
The technical meaning of maintenance involves functional checks, servicing, repairing or replacing of necessary devices, equipment, machinery, building infrastructure, and supporting utilities in industrial, business, and residential installations. Over time, this has come to include multiple wordings that describe various cost-effective practices to keep equipment operational; these activities occur either before or after a failure. Definitions Maintenance functions can defined as maintenance, repair and overhaul (MRO), and MRO is also used for maintenance, repair and operations. Over time, the terminology of maintenance and MRO has begun to become standardized. The United States Department of Defense uses the following definitions:Federal Standard 1037C and from MIL-STD-188 and from the Department of Defense Dictionary of Military and Associated Terms * Any activity—such as tests, measurements, replacements, adjustments, and repairs—intended to retain or restore a fun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maintenance (technical)
The technical meaning of maintenance involves functional checks, servicing, repairing or replacing of necessary devices, equipment, machinery, building infrastructure, and supporting utilities in industrial, business, and residential installations. Over time, this has come to include multiple wordings that describe various cost-effective practices to keep equipment operational; these activities occur either before or after a failure. Definitions Maintenance functions can defined as maintenance, repair and overhaul (MRO), and MRO is also used for maintenance, repair and operations. Over time, the terminology of maintenance and MRO has begun to become standardized. The United States Department of Defense uses the following definitions:Federal Standard 1037C and from MIL-STD-188 and from the Department of Defense Dictionary of Military and Associated Terms * Any activity—such as tests, measurements, replacements, adjustments, and repairs—intended to retain or restore a fun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Repairability
Repairability is a measure of the degree to and ease with which a product can be repaired and maintained, usually by end consumers. Repairable products are put in contrast to obsolescence or products designed with planned obsolescence. Repairability index Some private organizations and companies, mostly affiliated with the right to repair movement, assign repairability scores to products as a way of communicating to consumers how easily repairable the product is. France Since 2021, all electronic devices sold in France have been required to report a ''repairability index'' (french: Indice de réparabilité) which rates how repairable a product is on a scale from 0 to 10, primarily to prevent corporate greenwashing and encourage environmental transparency. Products are evaluated on 5 key areas: documentation, disassembly, spare parts availability, spare part pricing, and product specifics. Limitations The repairability index scoring process isn't bulletproof, though—m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Engineering
Engineering is the use of scientific method, scientific principles to design and build machines, structures, and other items, including bridges, tunnels, roads, vehicles, and buildings. The discipline of engineering encompasses a broad range of more specialized List of engineering branches, fields of engineering, each with a more specific emphasis on particular areas of applied mathematics, applied science, and types of application. See glossary of engineering. The term ''engineering'' is derived from the Latin ''ingenium'', meaning "cleverness" and ''ingeniare'', meaning "to contrive, devise". Definition The American Engineers' Council for Professional Development (ECPD, the predecessor of Accreditation Board for Engineering and Technology, ABET) has defined "engineering" as: The creative application of scientific principles to design or develop structures, machines, apparatus, or manufacturing processes, or works utilizing them singly or in combination; or to construct o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Design For X
Design for Excellence or Design For Excellence (DfX or DFX), are terms and expansions used interchangeably in the existing literature, where the ''X'' in ''design for X'' is a variable which can have one of many possible values. In many fields (e.g., very-large-scale integration (VLSI) and nanoelectronics) ''X'' may represent several traits or features including: manufacturability, power, variability, cost, yield, or reliability.Saraju Mohanty, Chapter 3 Nanoelectronics Issues in Design for excellence,Nanoelectronic Mixed-Signal System Design, and 0071825711, 1st Edition, McGraw-Hill, 2015. This gives rise to the terms design for manufacturability (DfM, DFM), design for inspection (DFI), design for variability (DfV), design for cost (DfC). Similarly, other disciplines may associate other traits, attributes, or objectives for ''X''. Under the label ''design for X'', a wide set of specific design guidelines are summarized. Each design guideline addresses a given issue that is cause ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telecommunications Engineering
Telecommunications Engineering is a subfield of electrical engineering which seeks to design and devise systems of communication at a distance. The work ranges from basic circuit design to strategic mass developments. A telecommunication engineer is responsible for designing and overseeing the installation of telecommunications equipment and facilities, such as complex electronic switching systems, and other plain old telephone service facilities, optical fiber cabling, IP networks, and microwave transmission systems. Telecommunications engineering also overlaps with broadcast engineering. Telecommunication is a diverse field of engineering connected to electronic, civil and systems engineering. Ultimately, telecom engineers are responsible for providing high-speed data transmission services. They use a variety of equipment and transport media to design the telecom network infrastructure; the most common media used by wired telecommunications today are twisted pair, coaxial cabl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Throwaway Society
The throw-away society is a generalised description of human social concept strongly influenced by consumerism, whereby the society tends to use items once only, from disposable packaging, and consumer products are not designed for reuse or lifetime use. The term describes a critical view of overconsumption and excessive production of short-lived or disposable items over durable goods that can be repaired, but at its origins, it was viewed as a positive attribute. Origin of the term In its 1 August 1955 issue, ''Life'' published an article titled "Throwaway Living". This article has been cited as the source that first used the term "throw-away society". Rise of packaging waste The last century of economic growth saw both increased production and increased product waste. Between 1906 (the start of New York City waste collections) and 2005 there was a tenfold rise in "product waste" ( packaging and old products), from per person per year. Containers and packaging now represen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Software Sizing
Software sizing or Software size estimation is an activity in software engineering that is used to determine or estimate the size of a software application or component in order to be able to implement other software project management activities (such as estimating or tracking). Size is an inherent characteristic of a piece of software just like weight is an inherent characteristic of a tangible material. Background Software sizing is different from software effort estimation. Sizing estimates the probable size of a piece of software while effort estimation predicts the effort needed to build it. The relationship between the size of software and the effort required to produce it is called productivity. For example, if a software engineer has built a small web-based calculator application, we can say that the project effort was 280 man-hours. However, this does not give any information about the size of the ''software product'' itself. Conversely, we can say that the application s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serviceability (other)
Serviceability may refer to: *Serviceability (structure) *Serviceability (computer) *Serviceability (telecommunications) Serviceability may refer to: *Serviceability (structure) *Serviceability (computer) {{Other uses, Serviceability (other) In software engineering and hardware engineering, serviceability (also known as supportability) is one of the -ili ... * Serviceability (banking) {{dabconcept ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
