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System Context Diagram
A system context diagram (SCD) in engineering is a diagram that defines the boundary between the system, or part of a system, and its environment, showing the entities that interact with it. This diagram is a high level view of a system. It is similar to a block diagram. Overview System context diagrams show a system, as a whole and its inputs and outputs from/to external factors. According to Kossiakoff and Sweet (2011):Alexander Kossiakoff, William N. Sweet (2011). ''Systems Engineering: Principles and Practices'' p. 266 System context diagrams are used early in a project to get agreement on the scope under investigation. Context diagrams are typically included in a requirements document. These diagrams must be read by all project stakeholders and thus should be written in plain language, so the stakeholders can understand items within the document. Building blocks Context diagrams can be developed with the use of two types of building blocks: * ''Entities (Actors)'': l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graeme Simsion
Graeme C. Simsion (born 1956) is an Australian author, screenwriter, playwright and data modeller. Prior to becoming an author, Simsion was an information systems consultant, co-authoring the book ''Data Modelling Essentials,'' and worked in wine distribution. Literary career Don Tillman novels In 2012 Simsion won the Victorian Premier's Unpublished Manuscript Award for his book ''The Rosie Project''. The novel was published by Text Publishing to critical acclaim in Australia in January 2014. It has since sold more than three and a half million copies in over forty countries around the world. Simsion initially wrote ''The Rosie Project'' as a screenplay, which has since been optioned to Sony Pictures Entertainment. A sequel titled ''The Rosie Effect'', was published on 24 September 2014. The third and final book, '' The Rosie Result'', was published in February 2019. Other novels Simsion's third novel, ''The Best of Adam Sharp'' was published by Text Publishing in 2016. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Systems Analysis
Systems analysis is "the process of studying a procedure or business to identify its goal and purposes and create systems and procedures that will efficiently achieve them". Another view sees system analysis as a problem-solving technique that breaks down a system into its component pieces, and how well those parts work and interact to accomplish their purpose. The field of system analysis relates closely to requirements analysis or to operations research. It is also "an explicit formal inquiry carried out to help a decision maker identify a better course of action and make a better decision than they might otherwise have made." The terms analysis and synthesis stems from Greek, meaning "to take apart" and "to put together," respectively. These terms are used in many scientific disciplines, from mathematics and logic to economics and psychology, to denote similar investigative procedures. The analysis is defined as "the procedure by which we break down an intellectual or substa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Software Development Process
In software engineering, a software development process is a process of dividing software development work into smaller, parallel, or sequential steps or sub-processes to improve design, product management. It is also known as a software development life cycle (SDLC). The methodology may include the pre-definition of specific deliverables and artifacts that are created and completed by a project team to develop or maintain an application. Most modern development processes can be vaguely described as agile. Other methodologies include waterfall, prototyping, iterative and incremental development, spiral development, rapid application development, and extreme programming. A life-cycle "model" is sometimes considered a more general term for a category of methodologies and a software development "process" a more specific term to refer to a specific process chosen by a specific organization. For example, there are many specific software development processes that fit the spiral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Requirements Analysis
In systems engineering and software engineering, requirements analysis focuses on the tasks that determine the needs or conditions to meet the new or altered product or project, taking account of the possibly conflicting requirements of the various stakeholders, ''analyzing, documenting, validating and managing'' software or system requirements. Requirements analysis is critical to the success or failure of a systems or software project. The requirements should be documented, actionable, measurable, testable, traceable, related to identified business needs or opportunities, and defined to a level of detail sufficient for system design. Overview Conceptually, requirements analysis includes three types of activities: * Eliciting requirements: (e.g. the project charter or definition), business process documentation, and stakeholder interviews. This is sometimes also called requirements gathering or requirements discovery. *Recording requirements: Requirements may be document ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Network Diagram
A computer network diagram is a schematic depicting the nodes and connections amongst nodes in a computer network or, more generally, any telecommunications network. Computer network diagrams form an important part of network documentation. Symbolization Readily identifiable icons are used to depict common network appliances, e.g. routers, and the style of lines between them indicates the type of connection. Clouds are used to represent networks external to the one pictured for the purposes of depicting connections between internal and external devices, without indicating the specifics of the outside network. For example, in the hypothetical local area network pictured to the right, three personal computers and a server are connected to a switch; the server is further connected to a printer and a gateway router, which is connected via a WAN link to the Internet. Depending on whether the diagram is intended for formal or informal use, certain details may be lacking and must be det ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Graphical Methods
This is a list of graphical methods with a mathematical basis. Included are diagram techniques, chart techniques, plot techniques, and other forms of visualization. There is also a list of computer graphics and descriptive geometry topics. Simple displays *Area chart *Box plot ** Dispersion fan diagram *Graph of a function **Logarithmic graph paper * Heatmap *Histogram **Bar chart *Line chart *Pie chart * Plotting *Scatterplot *Sparkline *Stemplot *Radar chart Set theory *Venn diagram *Karnaugh diagram Descriptive geometry *Isometric projection *Orthographic projection *Perspective (graphical) Engineering drawing *Technical drawing **Graphical projection *Mohr's circle *Pantograph *Circuit diagram *Smith chart *Sankey diagram Systems analysis *Binary decision diagram *Control-flow graph *Functional flow block diagram *Information flow diagram *IDEF *N2 chart *Sankey diagram *State diagram *System context diagram *Data-flow diagram Cartography *Map projection *Orthographic proj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Event Partitioning
Event partitioning is an easy-to-apply systems analysis technique that helps the analyst organize requirements for large systems into a collection of smaller, simpler, minimally-connected, easier-to-understand "mini systems" / use cases. Overview The event-partitioning approach is explained by Stephen M. McMenamin and John F. Palmer in '' Essential Systems Analysis''. A brief version of the approach is described in the article on Data Flow Diagrams (DFDs). A more complete discussion is in Edward Yourdon's ''Just Enough Structured Analysis''. The description focuses on using the technique to create data flow diagrams, but it can be used to identify use cases as well. The premise of event partitioning is that systems exist to respond to external events: identify what happens in the business environment that requires planned responses, then define and build systems to respond according to the rules of the business. In particular, a business system exists to service the requests ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Information Flow Diagram
An information flow diagram (IFD) is a diagram that shows how information is communicated (or "flows") from a ''source'' to a ''receiver'' or ''target'' (e.g. A→C), through some medium. The medium acts as a bridge, a means of transmitting the information. Examples of media include word of mouth, radio, email, etc. The concept of IFD was initially used in radio transmission. The diagrammed system may also include feedback, a reply or response to the signal that was given out. The return paths can be two-way or bi-directional: information can flow back and forth. An IFD can be used to model the information flow throughout an organisation. An IFD shows the relationship between internal information flows within an organisation and external information flows between organisations. It also shows the relationship between the internal departments and sub-systems. An IFD usually uses "blobs" to decompose the system and sub-systems into elemental parts. Lines then indicate how the inform ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 and data modeling. When using UML, the activity diagram typically takes over the role of the data-flow diagram. A special form of data-flow plan is a site ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ArchiMate
ArchiMate ( ; originally from Architecture-Animate) is an open and independent enterprise architecture modeling language to support the description, analysis and visualization of architecture within and across business domainsWhat is ArchiMate? at archimate.org from archive.org. Accessed April 19, 2014 in an unambiguous way. ArchiMate is a technical standard from and is based on concepts from the now superseded standard. It is supported by various tool vendors and consulting firms. ArchiMate is also a regist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unified Modeling Language
The Unified Modeling Language (UML) is a general-purpose, developmental modeling language in the field of software engineering that is intended to provide a standard way to visualize the design of a system. The creation of UML was originally motivated by the desire to standardize the disparate notational systems and approaches to software design. It was developed at Rational Software in 1994–1995, with further development led by them through 1996. In 1997, UML was adopted as a standard by the Object Management Group (OMG), and has been managed by this organization ever since. In 2005, UML was also published by the International Organization for Standardization (ISO) as an approved ISO standard. Since then the standard has been periodically revised to cover the latest revision of UML. In software engineering, most practitioners do not use UML, but instead produce informal hand drawn diagrams; these diagrams, however, often include elements from UML. History Before UML 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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