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Structured Systems Analysis And Design Method
Structured systems analysis and design method (SSADM) is a systems approach to the analysis and design of information systems. SSADM was produced for the Central Computer and Telecommunications Agency, a UK government office concerned with the use of technology in government, from 1980 onwards. Overview SSADM is a waterfall method for the analysis and design of information systems. SSADM can be thought to represent a pinnacle of the rigorous document-led approach to system design, and contrasts with more contemporary agile methods such as DSDM or Scrum. SSADM is one particular implementation and builds on the work of different schools of structured analysis and development methods, such as Peter Checkland's soft systems methodology, Larry Constantine's structured design, Edward Yourdon's Yourdon Structured Method, Michael A. Jackson's Jackson Structured Programming, and Tom DeMarco's structured analysis. The names "Structured Systems Analysis and Design Method" and " ...
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Central Computer And Telecommunications Agency
The Central Computer and Telecommunications Agency (CCTA), formerly the Central Computer Agency (CCA), was a UK government agency providing computer and telecoms support to government departments. History Formation Archived records CCTA records are held by The National Archives. In 1957, the UK government formed the Central Computer Agency (CCA) Technical Support Unit (TSU) within HM Treasury to evaluate and advise on computers, initially based around engineers from the telecommunications service. As this unit evolved, it morphed into the Central Computer and Telecommunications Agency, which also had responsibilities for procurement of United Kingdom Government technological equipment, and later, that centrally funded for University and Research Council systems. Technical services Note that nearly all names and authors, quoted or referenced in this section, were CCTA engineers or scientists. The first external technical publication was in 1960 by J. W. Freebo ...
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Jackson Structured Programming
Jackson structured programming (JSP) is a method for structured programming developed by British software consultant Michael A. Jackson (computer scientist), Michael A. Jackson and was described in his 1975 book ''Principles of Program Design''.. The technique of JSP is to analyze the data structures of the files that a program must read as input and produce as output, and then produce a program design based on those data structures, so that the program control structure handles those data structures in a natural and intuitive way. JSP describes structures (of both data and programs) using three basic structures – sequence, iteration, and selection (or alternatives). These structures are diagrammed as (in effect) a visual representation of a regular expression. Introduction Michael A. Jackson (computer scientist), Michael A. Jackson originally developed JSP in the 1970s. He documented the system in his 1975 book ''Principles of Program Design''. In a 2001 conference talk, he ...
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Information Systems
An information system (IS) is a formal, sociotechnical, organizational system designed to collect, process, store, and distribute information. From a sociotechnical perspective, information systems comprise four components: task, people, structure (or roles), and technology. Information systems can be defined as an integration of components for collection, storage and processing of data, comprising digital products that process data to facilitate decision making and the data being used to provide information and contribute to knowledge. A computer information system is a system, which consists of people and computers that process or interpret information. The term is also sometimes used to simply refer to a computer system with software installed. "Information systems" is also an academic field of study about systems with a specific reference to information and the complementary networks of computer hardware and software that people and organizations use to collect, filter, p ...
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Logical Data Model
A logical data model or logical schema is a data model of a specific problem domain expressed independently of a particular database management product or storage technology (physical data model) but in terms of data structures such as relational tables and columns, object-oriented classes, or XML tags. This is as opposed to a conceptual data model, which describes the semantics of an organization without reference to technology. Overview Logical data models represent the abstract structure of a domain of information. They are often diagrammatic in nature and are most typically used in business processes that seek to capture things of importance to an organization and how they relate to one another. Once validated and approved, the logical data model can become the basis of a physical data model and form the design of a database. Logical data models should be based on the structures identified in a preceding conceptual data model, since this describes the semantics of the informa ...
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Data Flow Diagram
A data-flow diagram is a way of representing a flow of data through a process or a system (usually an information system). The DFD also provides information about the outputs and inputs of each entity and the process itself. A data-flow diagram has no control are no decision rules and no loops. Specific operations based on the data can be represented by a flowchart. There are several notations for displaying data-flow diagrams. The notation presented above was described in 1979 by Tom DeMarco as part of structured analysis. For each data flow, at least one of the endpoints (source and / or destination) must exist in a process. The refined representation of a process can be done in another data-flow diagram, which subdivides this process into sub-processes. The data-flow diagram is a tool that is part of structured analysis, data modeling and threat modeling. When using Unified Modeling Language, UML, the activity diagram typically takes over the role of the data-flow diagram. A ...
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The Stationery Office
The Stationery Office (TSO) is a British publishing company created in 1996 when the publishing arm of Her Majesty's Stationery Office was privatised. It is the official publisher and the distributor for legislation, command and house papers, select committee reports, ''Hansard'', and the London, Edinburgh and Belfast Gazettes, the UK government's three official journals of record. With more than 9,000 titles in print and digital formats published every year, it is one of the UK's largest publishers by volume. TSO provides services, consultancy, and infrastructure to deliver all aspects of the information lifecycle. TSO developed the website legislation.gov.uk with The National Archives, providing full access to the statute book as open data. The TSO OpenUp platform is a collection of integrated services available as software as a service (SaaS), with the aim of providing a scalable and resilient platform that allows organisations to store, query, and enrich their data. His ...
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Euromethod
Euromethod is a method for managing procurement processes of Information Services. It focuses on contract management. Euromethod consists of three books: a reference manual, a dictionary and a collection of annexes. Euromethod's first release was in 1996. It has evolved into the Information Services Procurement Library (ISPL), which has published a set of manuals. History Euromethod is the result of a European project ordered and funded by DGIII (Industry) of the European Commission. It has been achieved by a consortium containing Sema Group (France), BT Group (UK), Cap-Volmac (The Netherlands), CGI (France), Datacentralen (Denmark), EMSC (Consortium of Bull-Olivetti-Siemens), Finsiel (Italy), INA (Portugal), Indra (Spain), and Softlab (Germany). The project Director was Marcel Franckson. The reference version has been written in English. It has been translated into French, German, Italian, Spanish, Portuguese, Dutch and Danish. References Eurogroup Consortium and EC DGIII, ...
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Office Of Government Commerce
The Office of Government Commerce (OGC) was a Government of the United Kingdom, UK Government Office established as part of HM Treasury in 2000. It was moved into the Efficiency and Reform Group of the Cabinet Office in 2010, before being closed in 2011. Overview A ''Review of Civil Procurement in Central Government'' was undertaken by Peter Gershon, then a company director, which had been requested in November 1998 by the Paymaster General and the Parliamentary Secretary for the Cabinet Office, Parliamentary Secretary to the Cabinet Office and was published in April 1999. This review recommended the establishment of a central procurement organisation within central government, which Gershon called the ''Office of Government Commerce''. He noted in his report that the review had been initiated because of the then-Prime Minister Tony Blair's interest in a Ministerial Cabinet Committee report on Public Expenditure published the previous April. The OGC operated through the Governme ...
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Trademark
A trademark (also written trade mark or trade-mark) is a form of intellectual property that consists of a word, phrase, symbol, design, or a combination that identifies a Good (economics and accounting), product or Service (economics), service from a particular source and distinguishes it from others. Trademarks can also extend to non-traditional marks like drawings, symbols, 3D shapes like product designs or packaging, sounds, scents, or specific colours used to create a unique identity. For example, Pepsi® is a registered trademark associated with soft drinks, and the distinctive shape of the Coca-Cola® bottle is a registered trademark protecting Coca-Cola's packaging design. The primary function of a trademark is to identify the source of goods or services and prevent consumers from confusing them with those from other sources. Legal protection for trademarks is typically secured through registration with governmental agencies, such as the United States Patent and Trademark ...
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Edward Yourdon
Edward Nash Yourdon (April 30, 1944 – January 20, 2016) was an American software engineer, computer consultant, author and lecturer, and software engineering methodology pioneer. He was one of the lead developers of the structured analysis techniques of the 1970s and a co-developer of both the Yourdon/Whitehead method for object-oriented analysis/design in the late 1980s and the Coad/Yourdon methodology for object-oriented analysis/design in the 1990s. Biography Yourdon obtained his B.S. in applied mathematics from Massachusetts Institute of Technology (MIT) in 1965, and did graduate work in electrical engineering and computer science at MIT and the Polytechnic Institute of New York. In 1964 Yourdon started working at Digital Equipment Corporation developing FORTRAN programs for the PDP-5 minicomputer and later assembler for the PDP-8. In the late 1960s and early 1970s he worked at a small consulting firm and as an independent consultant. In 1974 Yourdon founded his ow ...
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UK Government
His Majesty's Government, abbreviated to HM Government or otherwise UK Government, is the central government, central executive authority of the United Kingdom of Great Britain and Northern Ireland.Overview of the UK system of government : Directgov – Government, citizens and rights
Archived direct.gov.uk webpage. Retrieved on 29 August 2014.
The government is led by the Prime Minister of the United Kingdom, prime minister (Keir Starmer since 5 July 2024) who appoints all the other British Government frontbench, ministers. The country has had a Labour Party (UK), Labour government since 2024 United Kingdom general election, 2024. The ...
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