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System Modeling Techniques
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QFD
Purpose: To transform customer needs into engineering characteristics for a product. Where it is applied: Product development and manufacturing.
DFSS
Purpose: To design products, services, and processes that meet customer expectations and can be produced at Six Sigma quality levels. Where it is applied: New product or process design to achieve high performance.
TRIZ
Purpose: To solve inventive problems and forecast technology evolution. Where it is applied: Product design, problem solving, patent circumvention.
Statecharts
Purpose: To describe the stateful behavior of a system. Where it is applied: Complex control systems, reactive systems.
Petri Nets
Purpose: To model concurrent, asynchronous, distributed, parallel, nondeterministic, and stochastic systems. Where it is applied: Workflow and process modeling.
CAE
Purpose: To use computer software to aid in engineering analysis tasks. Where it is applied: In engineering sectors for simulation, validation, and optimization of products.
OODA Loop
Purpose: To provide a decision-making process for reacting to dynamic environments. Where it is applied: Military strategies, business, and litigation.
CMMI
Purpose: To provide a model for improving and appraising processes. Where it is applied: Software development, systems engineering, project management.
DFMEA
Purpose: To systematically evaluate and mitigate risk in product designs. Where it is applied: Design phase of product development, reliability engineering.
RAMS
Purpose: To ensure system reliability, availability, maintainability, and safety. Where it is applied: Industry sectors, particularly in the design and operation of complex systems.
DOE
Purpose: To plan, conduct, analyze, and interpret controlled tests to evaluate the factors that control the value of a parameter or group of parameters. Where it is applied: In various scientific and engineering fields to optimize products and processes.
SysML
Purpose: To create a standardized language for modeling complex systems. Where it is applied: Systems engineering, software engineering.
UML
Purpose: To provide a standard way to visualize the design of a system. Where it is applied: Software engineering and design.
SADT
Purpose: To provide a diagrammatic notation designed to depict complex systems. Where it is applied: Technical systems, processes, and software engineering.
FMEA
Purpose: To analyze potential failure modes within a system for classification by severity or determination of the effect of failures on the system. Where it is applied: It is used in manufacturing, testing, quality systems, and risk management.
BPMN
Purpose: To provide businesses with the capability of understanding their internal processes in a graphical notation. Where it is applied: Business process modeling.
MBSE
Purpose: To improve the quality of system modeling through formalized modeling techniques. Where it is applied: Systems engineering to manage complex systems.
FEA
Purpose: To simulate physical phenomena using numerical methods. Where it is applied: Structural analysis, thermal analysis, fluid dynamics.
Monte Carlo Simulation
Purpose: To understand the impact of risk and uncertainty in prediction and forecasting models. Where it is applied: Finance, project management, energy, engineering, research and development.
IDEF0
Purpose: To model the functions of a system and their relationships. Where it is applied: Systems analysis and business process re-engineering.
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