> ## Documentation Index > Fetch the complete documentation index at: https://docs.dalus.io/llms.txt > Use this file to discover all available pages before exploring further. # Overview > Welcome to the Dalus documentation ## What is Dalus? Dalus enables engineering teams to **model complex hardware systems**, **manage and verify requirements**, and **preserve engineering knowledge** in a collaborative environment. Purpose-built for aerospace, defense, and hardware engineering teams building mission-critical systems. Learn the core modeling concepts Build your first model in 10 minutes Get intelligent assistance for your designs *** ## Core Capabilities ### Architecture & Modeling Build complete system architectures with hierarchical parts, interfaces, and behavior models—all in one visual canvas. Create parts, ports, interfaces, and connections to model the physical and logical architecture of your system Define actions with Python scripts, connect them with signals, and build state machines to orchestrate system behavior Navigate through hierarchical models, switch views, and explore your system architecture effortlessly Generate model elements, analyze architecture, and get intelligent assistance for your design decisions ### Requirements & Traceability Capture, organize, and trace requirements from specification to implementation with full bidirectional traceability. Capture requirements, build hierarchies, assign to systems, and track verification status Import requirements from Excel and CSV, export for reporting and compliance documentation ### Analysis & Safety Make informed engineering decisions with structured analysis tools and comprehensive safety workflows. Compare design alternatives against weighted criteria to make objective engineering decisions Identify hazards, assess risk levels, and track mitigation controls for system safety analysis Plan, execute, and track verification tests with full traceability to requirements ### Collaboration & Documentation Work together in real-time, manage documents, and maintain version history across your team. Invite team members, assign roles, and work together on models simultaneously Upload specs, drawings, 3D models, and link them to the parts they describe Create snapshots of your model and restore to any previous state when needed Connect with Excel and other tools to fit into your existing engineering workflow *** ## Why Engineering Teams Choose Dalus Move beyond documents and spreadsheets to a single source of truth. Dalus captures your system architecture, requirements, and analysis in one connected model that stays in sync as your design evolves. The AI Copilot understands your model context and can generate parts, analyze architectures, process requirements from documents, and answer questions about your system design. Every requirement traces to system elements, every test case links to what it verifies, and every design decision is documented. Navigate relationships bidirectionally to understand impact and coverage. Work with your team simultaneously on the same model. See changes in real-time, manage permissions with roles, and maintain a complete audit trail of who changed what and when. *** ## Ready to get started? Follow our step-by-step quickstart guide to create your first system model in Dalus Understand the fundamental building blocks before diving into the tools