Production launch is not the end of software delivery. System value depends on how reliably it can be operated, maintained, and improved after launch.
A practical SLA model usually defines three levels:
- Critical incidents with direct service or revenue impact
- High-priority issues slowing operations
- Planned improvements suitable for scheduled releases
Maintenance quality requires more than ticket response. Teams should maintain performance trends, error clusters, release notes, and preventive improvement routines.
When SLA includes proactive engineering work, technical debt grows slower and delivery confidence improves across product and operations teams.