Critical Spare Parts: Set Reorder Rules for Overseas Equipment
Choose spare-part stock and reorder triggers using downtime impact, replenishment time, compatibility and service-life constraints.
China Thermic Editorial Team
A useful spare-parts policy explains what to stock, when to reorder and how to confirm that a stored item will work on the installed machine. Purchase price alone is a weak priority rule: an inexpensive component may stop production, while an expensive item may have an acceptable alternative.
START WITH A FAILURE CONSEQUENCE
For each candidate spare, record the affected function, production consequence and any approved temporary operating arrangement. Distinguish routine consumables from parts that are rarely used but necessary for recovery. Use actual maintenance history where available, and make uncertainty explicit for a new line.
ABB's spare-parts guidance distinguishes routine maintenance packages from critical and custom-manufactured capital spares, whose delivery characteristics can differ: https://www.abb.com/global/en/areas/motion/services/operations-and-maintenance/spare-parts
COMPARE THE FULL REPLENISHMENT TIME
Include supplier availability, order approval, transport, import handling and receiving checks in the estimate. Separate a quoted dispatch time from arrival at the factory. Confirm the current supply position when setting the policy, and record an alternative source only after the replacement is technically approved.
For each stocked item, assign a minimum usable quantity and a reorder trigger justified by the expected demand and replenishment uncertainty. Avoid applying one universal number to every component.
CHECK USABILITY, NOT JUST QUANTITY
Record part number, revision, installed application, storage location and condition. A compatible drive or control module may also need the correct configuration and engineering support. Verify these dependencies before counting it as ready stock.
Siemens describes service-parts planning as dependent on current asset configuration and a maintained service bill of materials: https://www.siemens.com/en-us/technology/service-parts-management/
KEEP REPLENISHMENT VISIBLE
When a spare is issued, create a replenishment action rather than waiting for the next inventory count. Distinguish available stock from reserved, damaged or quarantined items. Review storage requirements, shelf-life restrictions and product obsolescence with the relevant manufacturer.
FAQ: IS BUYING TWO OF EVERY PART A SAFE POLICY?
It can still leave the wrong gaps while tying up money in unused stock. The appropriate quantity depends on consequence, usage, interchangeability, supply time and the condition of stored items.
REVIEW AT EACH MAJOR CHANGE
Update the policy after a controls upgrade, new product duty, repeated failure or significant supplier lead-time change. The deliverable should be a dated list with a clear owner, approved substitutes, usable stock and open replenishment actions.