Maintenance and Inspection Management System

# Personal Development Project
A web-based business system that provides unified management of air conditioning, servers, manufacturing equipment, refrigeration systems, and store facilities owned by enterprises—from equipment registration through periodic inspections, anomaly detection, repairs, recovery, history tracking, and maintenance KPIs.

Main Features

• Equipment Registry Management – Registration, editing, and QR code generation for equipment information
• Periodic Inspection Planning – Automatic generation of inspection schedules with daily to annual and custom cycle intervals
• Inspection Templates – Customizable inspection items by equipment type (status judgment, numerical values, text)
• Inspection Checklists – Recording of measured values, comments, and photo references
• Anomaly Detection & Incidents – Automatic conversion from anomaly judgment to repair requests
• Repair Workflow – Assignment → response → cause/work/parts recording → recovery confirmation
• Asset History Timeline – Integrated display of installation, inspection, anomalies, repairs, and recovery
• Maintenance KPIs – Automatic calculation of MTTR (Mean Time To Repair), MTBF (Mean Time Between Failures), and inspection deadline compliance rate
• Alert Management – Visualization of inspection deadline overages, unaddressed anomalies, extended downtime, and repair deadline overages
• QR & Mobile Support – Equipment verification and inspection initiation via QR code scanning
• Role Management – Permission separation for inspection staff, maintenance staff, and administrators

Characteristics

• Upon inspection completion, any detected anomalies are automatically converted to incidents within the same operation
• Downtime is measured precisely from actual stoppage to recovery confirmation, not from work start time
• Cycle calculations maintain the anchor date on a monthly basis, returning to the original schedule even after delays
• All state transitions and major operations are recorded in audit logs
• Template definitions by equipment type do not affect already-generated inspection records (snapshot preservation)
• TypeScript domain layer validates state transitions and permissions to prevent unauthorized process skipping

The demo site includes comprehensive sample data with 30 pieces of equipment, 5 template types, 73 inspection records, 13 incidents, and 9 repair records.