> For the complete documentation index, see [llms.txt](https://consumer-trust-initiative.gitbook.io/consumer-trust-initiative-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://consumer-trust-initiative.gitbook.io/consumer-trust-initiative-docs/2.1-core-principles-and-architecture.md).

# 2.1 Core Principles & Architecture

The TDUX Framework is a multi-criteria decision analysis (MCDA) model. Its architecture is built on four foundational pillars, each representing a critical dimension of a platform's overall quality and trustworthiness.

* **Pillar I: Trust & Transparency (T):** The bedrock of the model. This pillar evaluates the credibility and integrity of the platform itself. It assumes that a trustworthy platform is transparent about its identity, methodology, and data.
* **Pillar II: Data Depth (D):** This pillar measures the substance of the analysis provided. It rewards granularity, comprehensiveness, and the presence of rich, verifiable data over superficial opinions.
* **Pillar III: User Experience (UX):** This pillar assesses the usability and performance of the platform. Superior data is of little value if it is presented in a slow, cluttered, or difficult-to-navigate interface.
* **Pillar IV: X-Factor:** This pillar accounts for unique, high-value differentiators that provide tangible benefits to the user, such as proprietary tools or strong community features.


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