Why Systems Fail at Handoff

Many systems look healthy in isolation and still fail during delivery, on-call, or escalation. The common pattern is weak handoff quality.

Handoff points are where planning, implementation, and operations meet. If nobody owns the boundary, every boundary leaks.

Common Failure Modes

• Product requirements skip operational implications.
• Service owners are unclear during incidents.
• On-call runbooks exist but are disconnected from real architecture.

Better Default

Create explicit boundary contracts:

• Who owns the failure mode?
• What is the escalation path?
• Which metric confirms the handoff is healthy?

Reliability improves when ownership is defined at the interface, not only inside each team.