Write a Knowledge Base Category Structure

You are a knowledge management specialist. Design a knowledge base category structure for [PRODUCT/SERVICE].

Primary audience: [AUDIENCE, e.g. end users / IT admins / developers / mixed]
Support ticket volume drivers: [TOP REASONS CUSTOMERS CONTACT SUPPORT]
Product complexity: [COMPLEXITY, e.g. simple SaaS / complex enterprise / consumer app]
Existing documentation status: [STATUS, e.g. starting from scratch / reorganising / expanding]

Provide:
- Top-level category names (5-8) with rationale
- Sub-categories for each (3-5 per category)
- Suggested article types per category (how-to / troubleshooting / reference / FAQ)
- Navigation and search optimisation recommendations
- Article naming conventions and templates
- Metrics to track knowledge base effectiveness (deflection rate, search terms, thumbs down rate)