--- title: "Core concepts of systems approach" source: "https://systems-analysis.info/eng/Core_concepts_of_systems_approach" wiki: "systems-analysis.info/eng" article: "Core_concepts_of_systems_approach" language: "en" categories: - "Category:English" - "Category:Science" - "Category:Systems approach" - "Category:Systems theory" - "Category:Terminology" revision_id: 105 wiki_created_at: 2026-09-06T22:17:27Z wiki_modified_at: 2026-09-06T22:17:27Z downloaded_at: 2026-09-07T22:21:03Z --- # Core concepts of systems approach # Core Concepts of the Systems Approach **The core concepts of the [Systems approach](https://systems-analysis.info/eng/Systems_approach "Systems approach")** encompass the fundamental categories, principles, and tools used for describing, modeling, researching, and managing complex systems. These concepts serve as the foundational framework for [Systems thinking](https://systems-analysis.info/eng/Systems_thinking "Systems thinking"), systems design, and decision-making under conditions of uncertainty and complexity. ## Basic Categories of Systems - [System](https://systems-analysis.info/eng/System "System") - [Concept of a system](https://systems-analysis.info/eng/Concept_of_a_system "Concept of a system") - [Definitions of a system](https://systems-analysis.info/eng/Definitions_of_a_system "Definitions of a system") - [Properties of systems](https://systems-analysis.info/eng/Properties_of_systems "Properties of systems") - Principles of systems - [System boundary](https://systems-analysis.info/eng/System_boundary "System boundary") - [System environment](https://systems-analysis.info/eng/System_environment "System environment") ## Structure and Organization of Systems - [System structure](https://systems-analysis.info/eng/System_structure "System structure") - [System structuring](https://systems-analysis.info/eng/System_structuring "System structuring") - [Hierarchy](https://systems-analysis.info/eng/Hierarchy "Hierarchy") - [Emergence](https://systems-analysis.info/eng/Emergence "Emergence") - [Equifinality](https://systems-analysis.info/eng/Equifinality "Equifinality") - [System element](https://systems-analysis.info/eng/System_element "System element") - [Subsystem](https://systems-analysis.info/eng/Subsystem "Subsystem") - [Metasystem](https://systems-analysis.info/eng/Metasystem "Metasystem") - Relationships in systems ## Dynamics and Behavior of Systems - [System state](https://systems-analysis.info/eng/System_state "System state") - [System behavior](https://systems-analysis.info/eng/System_behavior "System behavior") - [Dynamic properties](https://systems-analysis.info/eng/Dynamic_properties "Dynamic properties") - [System development](https://systems-analysis.info/eng/System_development "System development") - [System stability](https://systems-analysis.info/eng/System_stability "System stability") - [System adaptability](https://systems-analysis.info/eng/System_adaptability "System adaptability") - [Self-organizing systems](https://systems-analysis.info/eng/Self-organizing_systems "Self-organizing systems") - [Homeostasis](https://systems-analysis.info/eng/Homeostasis "Homeostasis") - Feedback - [Black box](https://systems-analysis.info/eng/Black_box "Black box") - Open system - Closed system ## Functional Aspects of Systems - [Function](https://systems-analysis.info/eng/Function "Function") - [Goal](https://systems-analysis.info/eng/Goal "Goal") - Goal in systems analysis - [Goal setting](https://systems-analysis.info/eng/Goal_setting "Goal setting") - [Activity](https://systems-analysis.info/eng/Activity "Activity") - Inputs and outputs - [Ideal and material models](https://systems-analysis.info/eng/Ideal_and_material_models "Ideal and material models") ## Modeling and Representation of Systems - [Model](https://systems-analysis.info/eng/Model "Model") - [System model](https://systems-analysis.info/eng/System_model "System model") - Modeling - [Modeling process](https://systems-analysis.info/eng/Modeling_process "Modeling process") - [Formalization of system models](https://systems-analysis.info/eng/Formalization_of_system_models "Formalization of system models") - [Process](https://systems-analysis.info/eng/Process "Process") - System description language - [Levels of system representation](https://systems-analysis.info/eng/Levels_of_system_representation "Levels of system representation") ## Problem Analysis and Decision-Making - [Problem](https://systems-analysis.info/eng/Problem "Problem") - [Problem in the context of systems analysis](https://systems-analysis.info/eng/Problem_in_the_context_of_systems_analysis "Problem in the context of systems analysis") - [Decision-making problem](https://systems-analysis.info/eng/Decision-making_problem "Decision-making problem") - [Decision-making](https://systems-analysis.info/eng/Decision-making "Decision-making") - Choice - Alternative - [Criterion](https://systems-analysis.info/eng/Criterion "Criterion") - [Evaluation of alternatives](https://systems-analysis.info/eng/Evaluation_of_alternatives "Evaluation of alternatives") - Optimal choice - Rational choice - [Decision tree](https://systems-analysis.info/eng/Decision_tree "Decision tree") - [Multi-criteria decision analysis](https://systems-analysis.info/eng/Multi-criteria_decision_analysis "Multi-criteria decision analysis") - [Fuzzy logic in decision-making](https://systems-analysis.info/eng/Fuzzy_logic_in_decision-making "Fuzzy logic in decision-making") - [Decision-making under uncertainty](https://systems-analysis.info/eng/Decision-making_under_uncertainty "Decision-making under uncertainty") - [Decision-making under risk](https://systems-analysis.info/eng/Decision-making_under_risk "Decision-making under risk") ## Methodological Foundations of Systems Analysis - [Systems approach](https://systems-analysis.info/eng/Systems_approach "Systems approach") - [Systemness](https://systems-analysis.info/eng/Systemness "Systemness") - [Systems thinking](https://systems-analysis.info/eng/Systems_thinking "Systems thinking") - [Systems holism](https://systems-analysis.info/eng/Systems_holism "Systems holism") - Systemic integrity - [Systems theory](https://systems-analysis.info/eng/Systems_theory "Systems theory") - Methodology of systems analysis - [Classical methodologies of systems analysis](https://systems-analysis.info/eng/Classical_methodologies_of_systems_analysis "Classical methodologies of systems analysis") - Basic concepts of systems analysis - [Objective and subjective in systems analysis](https://systems-analysis.info/eng/Objective_and_subjective_in_systems_analysis "Objective and subjective in systems analysis") - [Observer in the systems approach](https://systems-analysis.info/eng/Observer_in_the_systems_approach "Observer in the systems approach") - Uncertainty in a system ## Auxiliary Concepts - Classifications of systems - Classifications of system modeling methods ## External links - Systems thinking — Wikipedia ## See also - [Observer in the systems approach](https://systems-analysis.info/eng/Observer_in_the_systems_approach "Observer in the systems approach") - [Systems approach](https://systems-analysis.info/eng/Systems_approach "Systems approach") - [Systems holism](https://systems-analysis.info/eng/Systems_holism "Systems holism") - [Properties of systems](https://systems-analysis.info/eng/Properties_of_systems "Properties of systems") - [Self-organizing systems](https://systems-analysis.info/eng/Self-organizing_systems "Self-organizing systems")