Spare Parts Management

## Spare Parts

Spare Parts management supports forecasting, optimization, and availability of critical replacement parts for asset maintenance.
It connects real-world work orders, inventory levels, and procurement to ML-driven demand forecasts.

Spare Parts Overview

Key Types and Relationships

Type	Description
WorkOrder	Contains information about parts required for a maintenance task and their inventory status.
InventorySeries	Tracks stock and forecasted demand for each spare part across facilities.
InventoryMeasurement	Point-in-time snapshot of inventory levels for parts.
InventoryStats	Aggregated statistics for inventory management, like daily usage and lead time.
PurchaseOrderStats	Metrics related to procurement cycles and reordering efficiency.
PurchaserOrderLine	Individual line item in a purchase order for a part.
PurchaserOrderLineReceipt	Receipt confirmation for parts delivered from purchase orders.

Core Concepts

• Work Order Parts Forecasting:

  • For any given WorkOrder, parts demand can be forecasted and projected using current and historical data.

• Inventory Forecasting:

  • InventorySeries maintains time-series forecasts for stock depletion.
  • Predicts when reordering will be needed.

• Reorder Optimization:

  • InventoryStats helps compute:
    • Reorder Level: Minimum stock before triggering an order.
    • Days on Hand: How long existing stock will last.
    • Lead Time: Time from placing to receiving an order.

• Procurement Tracking:

  • Links between PurchaserOrderLine, PurchaseOrderStats, and PurchaserOrderLineReceipt ensure visibility from order to receipt.

• Cross-Facility Aggregation:

  • Spare parts data can be rolled up across multiple facilities to manage regional stock levels intelligently.

Example Spare Parts Lifecycle

Step	Description
1. Part Forecasting	Predict demand for parts from upcoming or planned work orders.
2. Inventory Evaluation	Check current stock using InventoryMeasurement and InventoryStats.
3. Reorder Triggering	When stock falls below reorder level, initiate purchase orders.
4. Purchase and Receipt	Track parts delivery via PurchaserOrderLine and PurchaserOrderLineReceipt.
5. Stock Update	Update inventory once parts are received and reconcile against forecasts.