# metis - PLS-SEM Software for Model Building and Analysis

> metis is a modern Windows and macOS desktop research environment for Partial Least Squares Structural Equation Modeling (PLS-SEM), featuring intuitive model design, fast execution, bootstrapping, PLSpredict, MICOM (Measurement Invariance for Composite Models), and automated publication-ready report generation.

## Core Capabilities & Features
- **Model Building & Graphical Interface**: Drag-and-drop structural and measurement model design, latent variable definition, reflective and formative indicators.
- **PLS-SEM Algorithm & Estimation**: Standard PLS path modeling, consistent PLS (PLSc), weighting schemes (Factor, Path, Centroid), stop criteria, maximum iteration controls.
- **Bootstrapping & Statistical Significance**: Fast multi-threaded bootstrapping, percentile and bias-corrected/accelerated (BCa) confidence intervals, one-tailed and two-tailed hypothesis testing.
- **Predictive Evaluation (PLSpredict)**: Out-of-sample prediction metrics ($Q^2_{predict}$, RMSE, MAE) with linear model (LM) benchmarks for model validation.
- **MICOM (Measurement Invariance for Composite Models)**: 3-step MICOM analysis (Configural Invariance, Compositional Invariance, Equality of Composite Means and Variances) for multi-group analysis.
- **Tark Report Builder**: Automated generation of publication-ready APA-style tables, construct reliability/validity reports (Cronbach's alpha, Composite Reliability $rho_a$, $rho_c$, AVE, HTMT matrix), discriminant validity tests, cross-loadings, and structural model evaluation.

## Key Pages & Resources
- [Home & Platform Overview](https://metis.emend.it.com/index.html): Complete overview of metis PLS-SEM desktop software.
- [Documentation & User Guide](https://metis.emend.it.com/docs.html): Comprehensive user guide, installation instructions, model building tutorials, and statistical reporting rules.
- [Download metis](https://metis.emend.it.com/download.html): Windows (.exe/installer) and macOS (.dmg) desktop installation downloads.
- [MICOM Feature Guide](https://metis.emend.it.com/metis-micom.html): Measurement Invariance for Composite Models specification, 3-step procedure, and multi-group analysis.
- [Tark Report Builder](https://metis.emend.it.com/tark-report.html): Automated PLS-SEM academic report and table generator.
- [How to Cite metis](https://metis.emend.it.com/how-to-cite.html): Academic citation guidelines, BibTeX, RIS, EndNote export formats.
- [Updates](https://metis.emend.it.com/updates.html): Version release updates and algorithm enhancements.
- [Product Roadmap](https://metis.emend.it.com/roadmap.html): Upcoming features, advanced algorithms, and development goals.
- [Screenshots & Workspace](https://metis.emend.it.com/screenshots.html): Interface previews, dark/light themes, and data visualization galleries.
- [Known Issues](https://metis.emend.it.com/known-issues.html): Support knowledge base, workarounds, and system compatibility notes.
- [Open Source Licence](https://metis.emend.it.com/licence.html): GPL-3.0 open-source licensing terms and usage guidelines.

## Optional Extended Documentation
- [Full LLM Specification](https://metis.emend.it.com/llms-full.txt): Extended technical overview, statistical algorithms, and detailed page listings.