Spare Parts Inventory SOP Template

1.Purpose

To make sure spare parts are available when needed for maintenance work, inventory records stay accurate, and storeroom stock is kept at a level that balances uptime against carrying cost.

2.Scope

Applies to maintenance repair and operations (MRO) spare parts held in the maintenance storeroom. Van stock for field service technicians and finished goods inventory are covered by separate procedures.

Definitions

Min/max level

The minimum quantity that triggers a reorder and the maximum quantity to order up to for a given part.

Critical spare

A part for a critical asset kept in stock specifically to avoid extended downtime if that asset fails, even if it is rarely used.

Cycle count

A partial inventory count of a subset of parts done on a rotating schedule instead of counting the entire storeroom at once.

Bin location

The specific shelf or bin where a part is stored, recorded in the CMMS so it can be found quickly.

3.Responsibilities

Storeroom Clerk

Receives, stocks and issues parts, maintains bin locations, and performs cycle counts.

Maintenance Technician

Requests parts against a work order and returns unused or core parts to the storeroom.

Maintenance Planner

Sets min/max levels for critical spares and reviews reorder points with purchasing.

Maintenance Manager

Reviews storeroom KPIs, approves the critical spares list, and investigates significant discrepancies.

RACI matrix

R = Responsible, A = Accountable, C = Consulted, I = Informed

4.Materials and PPE

Materials, tools and systems

• →CMMS or inventory management system with bin locations
• →Critical spares list
• →Barcode scanner or handheld inventory device
• →Receiving forms and purchase orders
• →Cycle count schedule
• →Core return tags

Personal protective equipment

• →Gloves for handling parts
• →Back support belt for lifting heavy items
• →Safety glasses when opening packaging with tools

5.Procedure

1. 5.1

   Set min and max stock levels

   Maintenance Planner

   Maintenance planner sets the minimum and maximum stock level for each part based on usage history, lead time and whether the asset it supports is a critical spare.

2. 5.2

   Receive incoming parts against the purchase order

   Storeroom Clerk

   Storeroom clerk checks the delivery against the purchase order and packing slip, inspecting for damage before accepting the shipment.

3. 5.3

   Put away parts to bin locations

   Storeroom Clerk

   Clerk stores received parts in their assigned bin location and updates the quantity and location in the CMMS.

   Checkpoint: System quantity and bin location match the physical parts before the receipt is closed.

4. 5.4

   Issue parts against a work order

   Storeroom Clerk

   Technician requests parts by work order number, and the clerk issues the part in the CMMS, deducting it from stock and linking it to the asset.

5. 5.5

   Return unused or core parts

   Maintenance Technician

   Technician returns any unused part or a defective core to the storeroom promptly, and the clerk logs the return and restocks or tags it for core credit.

6. 5.6

   Perform scheduled cycle counts

   Storeroom Clerk

   Clerk counts a rotating subset of parts each week per the cycle count schedule and compares the count to the system quantity.

7. 5.7

   Investigate and reconcile discrepancies

   Maintenance Manager

   Maintenance manager reviews any cycle count discrepancy above the tolerance, checks recent issue and receipt transactions, and approves a system adjustment with a documented reason.

   Checkpoint: Every inventory adjustment above tolerance has a documented reason before it is approved.

8. 5.8

   Reorder parts at the reorder point

   Maintenance Planner

   Clerk or planner generates a purchase requisition when a part's stock reaches its minimum level, following the standard reorder quantity.

9. 5.9

   Maintain the critical spares list

   Maintenance Planner

   Planner reviews the critical spares list quarterly against the current critical asset list, adding or removing parts as equipment changes.

10. 5.10

    Review slow-moving and obsolete stock

    Maintenance Manager

    Manager reviews parts with no usage in the past year, deciding whether to keep them as insurance spares, return them, or scrap them.

11. 5.11

    Audit storeroom security and access

    Maintenance Manager

    Manager periodically reviews who has access to the storeroom and confirms high-value or controlled parts are stored in a locked area.

12. 5.12

    Report storeroom KPIs

    Storeroom Clerk

    Clerk compiles fill rate, cycle count accuracy and stockout data for the maintenance manager's monthly review.

6.Quality checks

• →Cycle count accuracy stays above the target set by the maintenance manager.
• →Critical spares never fall below their minimum stock level without an active purchase order in progress.
• →Every inventory adjustment has a documented reason and manager approval.
• →Parts issued against a work order are recorded on the same day they leave the storeroom.

7.Records

• →Receiving records and purchase orders
• →Parts issue log by work order
• →Cycle count results and adjustment log
• →Critical spares list
• →Slow-moving and obsolete stock review

8.KPIs

• →Cycle count accuracy
• →Fill rate (requests met from stock on hand)
• →Stockouts on critical spares
• →Inventory carrying value against target

9.Common mistakes

• →Issuing a part without linking it to a work order, breaking the audit trail.
• →Letting a critical spare run out because usage wasn't tracked closely.
• →Adjusting inventory counts without investigating why the discrepancy occurred.
• →Storing parts outside their assigned bin location, making them hard to find.
• →Never reviewing the critical spares list after equipment changes.

10.Revision history