---
name: information-architecture
description: Organize and structure information for clarity and discoverability. Design navigation systems, hierarchies, and mental models that match user needs.
---

# Information Architecture

## Overview

Information Architecture creates logical structures that help users find and understand information easily.

## When to Use

- Website or app redesign
- Large information spaces (documentation, e-commerce)
- Navigation structure planning
- Taxonomy and categorization
- Search functionality design
- User journey mapping

## Instructions

### 1. **IA Principles & Process**

```yaml
IA Process:

1. Research & Discovery
  - Interview users about mental models
  - Card sorting sessions (open and closed)
  - Analyze current usage patterns
  - Competitive analysis

2. Structure Development
  - Create organization scheme (hierarchical, faceted, etc.)
  - Define categories and relationships
  - Build taxonomy
  - Plan navigation

3. Wireframing
  - Sitemap creation
  - Navigation structure
  - Page templates
  - User flows

4. Validation
  - User testing with prototypes
  - Tree testing (navigation only)
  - Iterate based on feedback

---

## Organization Schemes:

Hierarchical (Top-Down):
  - Home → Categories → Subcategories → Products
  - Clear parent-child relationships
  - Good for browsing

Faceted/Filtering:
  - Products filtered by multiple attributes
  - User can narrow down
  - Flexible combinations

Contextual:
  - Related items grouped together
  - Cross-links between sections
  - Supports exploration

Task-Based:
  - Organize by user goals/tasks
  - "How do I...?" approach
  - Matches mental models

---

## Navigation Types:

Primary Navigation:
  - Main categories
  - Top of page or left sidebar
  - Access from any page

Secondary Navigation:
  - Sub-categories
  - Related topics
  - Context-specific

Breadcrumb Navigation:
  - Shows user location in hierarchy
  - Enables backward navigation

Footer Navigation:
  - Links to important pages
  - Legal/company info
  - Helps with SEO
```

### 2. **Card Sorting & Taxonomy**

```python
# Organize content into logical groups

class InformationArchitecture:
    def conduct_card_sort(self, items):
        """Uncover user mental models"""
        return {
            'method': 'Open card sort (users create own categories)',
            'participants': 15,
            'items_sorted': len(items),
            'analysis': self.analyze_card_sort_results(items),
            'dendrograms': 'Show similarity between user groupings',
            'categories': self.identify_categories(items)
        }

    def identify_categories(self, items):
        """Find natural groupings"""
        categories = {}
        frequency = {}

        # Track how often items are grouped together
        # Find dominant groupings

        return {
            'primary_categories': self.get_primary_categories(frequency),
            'ambiguous_items': self.identify_ambiguous_items(frequency),
            'user_created_labels': self.extract_labels()
        }

    def create_taxonomy(self, categories):
        """Build hierarchical structure"""
        return {
            'level1': ['Products', 'Services', 'Support', 'Company'],
            'level2_products': ['Electronics', 'Clothing', 'Books'],
            'level3_electronics': ['Phones', 'Laptops', 'Accessories'],
            'relationships': 'Define parent-child and related items',
            'synonyms': 'Identify similar terms'
        }

    def validate_ia(self, structure):
        """Test with users"""
        return {
            'testing_method': 'Tree testing',
            'tasks': [
                'Find product return policy',
                'Locate shipping information',
                'Access account settings'
            ],
            'success_metrics': {
                'task_completion': '90% target',
                'time_to_complete': '<3 minutes',
                'satisfaction': '>4/5'
            }
        }
```

### 3. **Sitemap & Navigation Structure**

```yaml
Sitemap Example: E-commerce Site

Home
├── Products
│   ├── Electronics
│   │   ├── Phones
│   │   ├── Laptops
│   │   └── Accessories
│   ├── Clothing
│   │   ├── Men's
│   │   ├── Women's
│   │   └── Kids
│   └── Books
├── Services
│   ├── Shipping & Returns
│   ├── Extended Warranty
│   └── Installation
├── Support
│   ├── FAQ
│   ├── Contact Us
│   ├── Live Chat
│   └── Tickets
├── Account
│   ├── Orders
│   ├── Wishlist
│   ├── Returns
│   └── Settings
└── Company
    ├── About Us
    ├── Careers
    ├── Blog
    └── Affiliates

---

Navigation Labels:
  - Clear and predictable
  - Avoid jargon
  - Match user language
  - Consistent across site
```

### 4. **Search & Discovery**

```javascript
// Enable multiple ways to find content

class DiscoverabilityStrategy {
  designSearchFunctionality() {
    return {
      search_box: {
        location: 'Header, prominent placement',
        placeholder: 'Clear example text',
        autocomplete: true,
        filters: ['Category', 'Price', 'Rating']
      },
      search_results: {
        ranking: 'Relevance + popularity + freshness',
        facets: 'Allow filtering results',
        snippets: 'Show preview and highlights'
      },
      zero_results: {
        suggestions: 'Show did you mean, popular searches',
        related: 'Show related categories'
      }
    };
  }

  designBrowsing() {
    return {
      category_pages: {
        structure: 'Subcategories + featured items',
        sorting: 'By popularity, newest, price',
        pagination: 'Load more or paginate'
      },
      related_items: {
        placement: 'Product page, cart page',
        logic: 'Similar category, trending, recommended'
      }
    };
  }
}
```

## Best Practices

### ✅ DO
- Start with user research
- Conduct card sorting studies
- Use user mental models
- Keep hierarchy 3 levels deep max
- Use clear, simple labels
- Enable multiple ways to find content
- Test navigation with users
- Update based on usage data
- Document taxonomy
- Provide search functionality

### ❌ DON'T
- Impose organizational structure without research
- Use jargon or technical terms
- Make hierarchy too deep
- Bury important content
- Rely only on navigation (provide search)
- Change navigation frequently
- Create ambiguous labels
- Forget about edge cases
- Ignore accessibility
- Assume desktop-only navigation

## IA Tips

- Use clear, specific category names
- Avoid nested menus when possible
- Provide multiple paths to content
- Show context within hierarchy (breadcrumbs)
- Monitor analytics to improve structure