TemporalSaman Batool14 min readintermediate
When the human is the Workflow: Durable Execution in harsh physical field operations
Summary
Xgrid used Temporal to re-architect field operations for a construction company, modeling each shift as a durable workflow. This approach improved payroll accuracy, reduced tool loss, and simplified audits by handling unreliable networks, offline-first needs, and complex state transitions in harsh physical environments.
- Each scheduled shift is a single Temporal Workflow, acting as the durable source of truth for all related events.
- Bluetooth Low Energy (BLE) beacons replaced unreliable GPS for accurate, hands-free location tracking in challenging environments.
- Temporal's `WorkflowIdConflictPolicy.USE_EXISTING` ensures idempotency for duplicate requests like clock-ins, preventing multiple entries.
- The Signal-With-Start pattern handles offline-first scenarios by retroactively initializing workflows if a signal arrives before the start event.
This article is crucial for engineers building systems for physical field operations or any long-running, human-in-the-loop workflows in unreliable environments, demonstrating how durable execution simplifies complex state management and compliance.
7/10
