The Danger of Free-Form POS Statuses
Most generic Point-of-Sale systems allow staff to arbitrarily jump from "Device Checked In" to "Delivered" in a single click. This creates massive operational gaps:
- Skipped Quality Checks: Bypassing the benched diagnostic checklists entirely, leading to defective returns.
- Untracked Parts Consumption: Stockroom components are consumed without matching invoice entries.
- Frictionless Loss: Staff can manually bypass approval limits to discount services without manager awareness.
How iShopMaster Restores State Integrity
iShopMaster’s backend core operates a strict **Finite State Machine (FSM)**. Every ticket transaction checks against predefined rules:
- Explicit Transition Maps: A ticket at `Intake` can only shift to `Assigned` or `Diagnosing`. Skips to completion are rejected.
- Condition-Based Gating: Moving to `Quality Check` requires all individual repair components to be marked complete.
- Auditable Timestamps: The system logs `enteredAt` and `exitedAt` for every single lifecycle stage, generating precise efficiency benchmarks for store operations.