Factory operating control
Control Critical Spares as an Operating System
A critical-spares list should connect each part to an installed asset, verified part identity, failure consequence, demand pattern, lead time, storage life, local availability and recovery plan. Supplier recommendations are inputs, not a complete factory decision.
01 · Buyer or factory inputs
Information the decision needs
- Installed asset and bill-of-material references
- Supplier recommended startup and operating spares
- Failure history and consequence
- Procurement and import lead times
- Shelf life, storage and preservation conditions
- Interchangeability and repair options
02 · Operating objective
What completion should achieve
Hold the minimum justified recovery capability without losing part identity, condition or replenishment visibility.
03 · Required controls
Turn the objective into controlled work
- 01
Verify part number, revision and exact installed application
- 02
Classify criticality through failure consequence and recovery alternatives
- 03
Set stock basis from demand, lead time and preservation risk
- 04
Inspect receipt, storage, shelf life and protected condition
- 05
Issue parts to a work order and record the installed location
- 06
Trigger replenishment and review stock after use, failure or design change
04 · Factory interfaces
What connects to this decision
- Supplier parts list to installed equipment
- Warehouse stock to maintenance work order
- Design change to obsolete or interchangeable stock
- Failure history to minimum-stock review
- Emergency repair to replenishment and root-cause action
05 · Evidence to collect
Records that make review possible
- Verified spare-parts register
- Criticality and stock-basis record
- Receipt and preservation inspection
- Issue, installation and return history
- Replenishment, obsolescence and review action
06 · Common failure modes
Do not confuse a pattern with a confirmed cause
1A part number is copied without checking the installed revision
2Electronic or shelf-life-sensitive parts deteriorate in storage
3Parts are issued without recording the consuming asset
4A recurring failure depletes stock without changing the maintenance plan
07 · Responsibility boundary
Name who confirms each part
| Role | Possible responsibility in this stage |
|---|---|
| Operations owner | Defines the operating condition, assigns the record and confirms that actions fit the production plan. |
| Quality owner | Defines product-status, sampling, release and escalation controls within the factory system. |
| Maintenance owner | Confirms safe technical work, equipment condition, evidence and restart requirements. |
| Supplier / Allot Tech | Reviews the documented interface or symptom and coordinates project-specific questions within the agreed scope. |
08 · Completion criteria
Evidence that the stage can advance
- Critical parts map to installed assets
- Stock quantity has a documented basis
- Condition and shelf life are protected
- Issue and use are traceable
- Replenishment and obsolescence are controlled
Decision support
Questions operating teams ask
Is the supplier recommended list enough?
It is a starting input; site lead time, duty, local availability, failure consequence and repair capability must also be reviewed.
Should every expensive part be critical?
Cost alone does not determine criticality; consider consequence, detectability, recovery time and alternatives.
Editorial responsibility: Allot Tech (Suzhou) Co., Ltd. · Last updated .