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  2. Problem frames approach - Wikipedia

    en.wikipedia.org/wiki/Problem_Frames_Approach

    The problem analyst's basic tool for describing a problem is a problem diagram. Here is a generic problem diagram. In addition to the kinds of things shown on a context diagram, a problem diagram shows: a dotted oval representing the requirement to bring about certain effects in the problem domains.

  3. Multiple streams framework - Wikipedia

    en.wikipedia.org/wiki/Multiple_streams_framework

    The MSF was first proposed by John W. Kingdon to describe the agenda setting stage of the policy making process. [1] In developing his framework Kingdon took inspiration from the garbage can model of organizational choice, [2] which views organizations as anarchical processes resulting from the interaction of four streams: 1) choices, 2) problems, 3) solutions, and 4) energy from participants.

  4. Conceptual framework - Wikipedia

    en.wikipedia.org/wiki/Conceptual_framework

    The use of the term conceptual framework crosses both scale (large and small theories) [4] [5] and contexts (social science, [6] [7] marketing, [8] applied science, [9] art [10] etc.). The explicit definition of what a conceptual framework is and its application can therefore vary. Conceptual frameworks are beneficial as organizing devices in ...

  5. Systems modeling - Wikipedia

    en.wikipedia.org/wiki/Systems_modeling

    One of the first well defined function models, was the Functional Flow Block Diagram (FFBD) developed by the defense-related TRW Incorporated in the 1950s. [5] In the 1960s it was exploited by the NASA to visualize the time sequence of events in a space systems and flight missions. [ 6 ]

  6. Conceptual model - Wikipedia

    en.wikipedia.org/wiki/Conceptual_model

    Entity–relationship modeling is a database modeling method, used to produce a type of conceptual schema or semantic data model of a system, often a relational database, and its requirements in a top-down fashion. Diagrams created by this process are called entity-relationship diagrams, ER diagrams, or ERDs.

  7. List of unsolved problems in physics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result. The others are experimental, meaning that there is a difficulty in creating an experiment to test a proposed theory or investigate a phenomenon in greater detail.

  8. List of types of systems theory - Wikipedia

    en.wikipedia.org/wiki/List_of_types_of_systems...

    This list of types of systems theory gives an overview of different types of systems theory, which are mentioned in scientific book titles or articles. [1] The following more than 40 types of systems theory are all explicitly named systems theory and represent a unique conceptual framework in a specific field of science.

  9. Frame analysis - Wikipedia

    en.wikipedia.org/wiki/Frame_analysis

    Framing theory and frame analysis is a broad theoretical approach that has been used in communication studies, news (Johnson-Cartee, 1995), politics, and social movements among other applications. "Framing is the process by which a communication source, such as a news organization, defines and constructs a political issue or public controversy ...