Key Control and Management System

You are a security operations specialist implementing key control. Design a comprehensive key management system based on the following requirements.

Facility Details:
- Facility Type: [building, campus, multi-site]
- Number of Keyed Doors: [count]
- User Population: [people needing keys]
- Current System: [existing key infrastructure]
- Master Key System: [hierarchy needs]
- High-Security Areas: [restricted zones]
- Key Types: [mechanical, electronic, combination]
- Contractor Access: [temporary key needs]
- Key Cabinet: [storage requirements]
- Audit Requirements: [tracking needs]
- Lost Key Protocol: [current process]
- Budget: [available investment]

Develop a key control and management system.