# Learn technical writing

Start here if you're new to technical writing, or want a refresher on the principles behind everything else in this manual: where documentation maturity comes from, why simplicity is a discipline rather than an accident, and how the format you choose shapes every decision downstream.

  - [**The three levels of technical documentation**](https://docs.redaction-technique.org/en/costs/three-levels-of-documentation/): Locate where your organization
  - [**The KISS principle**](https://docs.redaction-technique.org/en/costs/kiss-principle/): Why the simplest solution that solves the problem beats the cleverest one, and how that applies to documentation.
  - [**Structured and unstructured formats**](https://docs.redaction-technique.org/en/formats/structured-vs-unstructured-formats/): The foundational format choice that determines everything downstream: content reuse, translation cost, and tooling.
  - [**Business case & strategy overview**](https://docs.redaction-technique.org/en/costs/): Maturity tiers, tooling costs, and documentation ROI — the argument for investing in a better process.

Once these foundations click, move on to [building a documentation process](https://docs.redaction-technique.org/en/process/) or jump straight to the [practical toolkit](https://docs.redaction-technique.org/en/toolkit/) for templates and checklists.

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Source: https://docs.redaction-technique.org/en/learn/