Free critical spares list template

What is a critical spares list template?

A critical spares list template is the shortlist of parts that a maintenance organisation must hold in stock right now because the combination of lead time, supplier risk and downtime cost makes a stock-out an unacceptable business risk. It is a distinct document from a maintenance bill of materials. A BOM covers every service-replaceable part attached to a parent asset, often running to hundreds of line items per asset. A critical spares list is the curated subset of those parts where the consequence of not having the part on hand at the moment of failure outweighs the holding cost of carrying inventory. The classification is built around the A/B/C framework: A-criticality parts have a unit-down risk, no approved substitute and a long lead time from a sole supplier, B-criticality parts have a workaround or short-lead substitute, and C-criticality consumables are excluded from the list.

A properly maintained critical spares list is the operational bridge between the reliability function and the finance function. Reliability owns the asset risk and defines the criticality threshold. Finance owns the working-capital impact and tests holding cost against avoided downtime cost. Both perspectives have to agree, because either side acting alone produces a bad outcome: a reliability-only view ties up working capital, a finance-only view accepts downtime risk operations cannot tolerate. The list is also the document reviewed under a Reliability-Centred Maintenance (RCM) programme, where each spare is challenged against the FMEA worksheet on the parent asset and the alternative-supplier landscape.

From a risk and compliance angle, ISO 55001 sets the asset management system requirement for documented inventory of critical spares, ISO 31000 provides the risk management framework that the criticality classification is grounded in, and the RCM framework drives the practical methodology for deciding what makes the list. Mining, utilities, manufacturing and process industries treat the critical spares list as a board-level operational risk artefact because a single stock-out can trigger million-dollar downtime events.

Learn more about maintenance and work orders in MapTrack.

Benefits of digitising forms in MapTrack

When you digitise critical spares process documents in MapTrack, you get:

• Field users can easily scan a QR code to complete a form on mobile. Unlimited users.
• Automatically get alerts when faults are identified.
• Link every form digitally as a PDF to the relevant asset, location or person.
• Receive a digital PDF copy with every submission to your email.
• Ability to share forms digitally.
• Build conditional logic (show or hide questions based on answers).
• Take pictures or attach photos. Not possible with a paper-based form.
• Electronic signatures.
• Edit forms later without reprinting.
• Restrict permissions (who can view, complete or approve).
• Build forms with AI (describe what you need and MapTrack suggests the form).
• Trigger work orders automatically when a fault is logged during an inspection.
• Track service intervals by hours, kilometres or calendar date in one place.
• Attach supplier invoices and parts receipts to each maintenance record.

Book a demo to see how MapTrack handles critical spares process documents.

What to include in a critical spares list template

This critical spares list template covers 13 key areas:

• Parent asset identification: parent asset ID, OEM make and model, serial number, parent-asset criticality classification and link to the FMEA worksheet
• Part identification: OEM part number, alternative or aftermarket part number where approved, clear description and link to the maintenance BOM line
• Criticality rating: A/B/C with A being unit-down risk no substitute long lead, B workaround or short-lead substitute, C excluded by definition
• Minimum stock level: the lowest stock level permitted before downtime risk becomes unacceptable, set against consumption rate and lead time
• Current stock level: actual on-hand quantity at the latest stock count, refreshed against the inventory system on a defined cadence
• Reorder point: the level that triggers an automatic purchase order, set above minimum by consumption-rate multiplied by lead-time, plus safety buffer
• Lead time days: lead-time from purchase order to dock-receipt at site against primary supplier, with secondary supplier lead-time as a fallback
• Alternative supplier identified: yes/no flag with the alternative supplier name, lead time and any pricing or qualification notes
• Last consumed date: date the part was last issued against a work order, used to identify slow-moving or obsolete-risk stock
• Financial value per unit: current replacement cost per unit and total inventory value held, used by finance to test holding cost
• Downtime value if stock-out: estimated production loss in dollars per hour or per shift if the part is not available when needed
• Designated storage location: stores bin location, climate-controlled or hazardous-goods area and access controls for high-value or restricted items
• Last review and sign-off: review date, the reliability lead and stores coordinator who signed it off and the next scheduled review date

How often should you complete this process document?

A critical spares list is reviewed against both a fixed annual cadence and a set of event-driven triggers. The annual review is the floor. Every parent-asset class on the list gets a full reliability-led review at least once a year, with the reliability lead, stores coordinator, finance representative and maintenance manager walking the list against the latest FMEA worksheet, work-order consumption data and supplier landscape. Event-driven triggers raise an out-of-cycle review whenever the underlying assumptions change. Specific triggers include: a primary supplier closure, acquisition or service-level change that affects lead time, an OEM service bulletin that supersedes a part number on the list, an FMEA update that adds or removes a failure mode on a parent asset, a work-order consumption pattern that surprises the team (a part being consumed faster or slower than the model predicted), an asset criticality reclassification that lifts or lowers the parent asset on the matrix, a financial-year working-capital review that challenges holding levels, and any near-miss stock-out where the team was within one or two units of running out of an A-criticality spare. MapTrack stamps every review and every event-driven update with date, author and trigger so the audit trail is preserved.

Applicable regulatory standards

This template aligns with the following regulations and standards:

• ISO 55001 (Asset management systems)
• ISO 31000 (Risk management)
• Reliability-Centred Maintenance (RCM) framework
• WHS Regulations 2011 Chapter 5

Related resources

More maintenance templates and guides:

• asset register template
• equipment maintenance log
• fmea worksheet template
• root cause analysis template
• work order job card template
• preventive maintenance checklist
• heavy equipment maintenance checklist
• asset tracking
• preventive maintenance scheduling
• plant compliance
• manufacturing
• construction