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+---
+type: concept
+title: "Midas NFX Analysis Workflow"
+created: 2026-06-02
+updated: 2026-06-02
+address: c-000174
+aliases:
+  - NFX analysis workflow
+tags:
+  - concept
+  - finite-element-method
+  - midas-nfx
+  - solver-workflow
+status: current
+related:
+  - "[[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]]"
+  - "[[midas NFX]]"
+  - "[[Finite Element Program Implementation]]"
+  - "[[Finite Element Modeling and Convergence Checks]]"
+  - "[[Midas NFX Element Library]]"
+  - "[[Midas NFX Equation Solvers and Eigen Extraction]]"
+sources:
+  - "[[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]]"
+---
+
+# Midas NFX Analysis Workflow
+
+## Definition
+
+The NFX workflow is the production analysis loop described in the [[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]]: define the finite element model, define the analysis case, solve, and inspect postprocessing results.
+
+## Model Contract
+
+The manual frames model definition around nodes, elements, mesh, loads, boundary conditions, analysis type, and result interpretation. It also makes the coordinate-system contract explicit: global coordinate systems, nodal displacement coordinate systems, element coordinate systems, material coordinate systems, element result coordinate systems, and element formulation coordinate systems can all be distinct.
+
+## File Contract
+
+The source identifies model files, solver input, run logs, text output, and binary postprocessing data. For a custom solver, that split is important because test harnesses need stable locations for model input, execution records, raw result files, and postprocessed quantities.
+
+## Analysis Families
+
+NFX covers linear static structural analysis, normal modes, linear buckling, direct/modal transient response, direct/modal frequency response, response spectrum, random response, nonlinear steady/transient heat transfer, nonlinear static, nonlinear quasi-static, nonlinear explicit transient, and nonlinear implicit transient analysis.
+
+## Solver Development Use
+
+This page is a requirements checklist for the outer application layer of a solver. Before implementing an element or constitutive model, the solver needs a concrete model schema, unit convention, coordinate-system policy, analysis-case type, input/output file contract, result-coordinate policy, and postprocessing result list.
+
+## Connections
+
+- [[Finite Element Program Implementation]] gives the generic implementation data flow.
+- [[Midas FEA Analysis Workflow]] and [[Midas Civil Numerical Analysis Model]] are sibling MIDAS workflow references.
+- [[Finite Element Modeling and Convergence Checks]] connects the workflow to model idealization and verification.