More parts do not automatically create resilience. Stock high-consequence, long-lead items that the site can replace; give low-frequency, difficult-to-store or specialist items a defined supply and service route.
What the spare-parts plan must resolve
Owners, stores, procurement and maintenance teams supporting remote prime and standby generation.
Combine criticality, failure likelihood, lead time, site capability and downtime consequence in one risk register.
Define site stock, regional stock, supplier-held stock, emergency transfer and do-not-stock strategies.
Safety stock depends on downtime consequence, likelihood and replenishment time, constrained by site replacement capability and shelf life. Protect fast-recoverable critical failures first and cover rare complex work through service arrangements.
01
Classify equipment by power role and consequence
Prime generation, dewatering or ventilation backup and camp standby have different consequences. The same service item is consumed differently on continuous and low-hour units.
- Separate prime, critical standby and general standby
- Record non-redundant equipment and allowable outage
- Classify production, safety and environmental consequence
02
Build candidates from failure modes and service demand
Include scheduled consumables, common failure items and rare high-consequence parts. Use OEM schedules, hours, alarms and work orders rather than a generic kit.
- Forecast filters, belts and fluids from running hours
- Use history for sensors, actuators and electrical items
- Identify common stock across identical models
03
Calculate the complete replenishment lead time
Lead time includes diagnosis, technical confirmation, quotation, production or picking, international freight, customs and final delivery. Model adverse wet-season access separately.
- Record normal and adverse lead time
- Confirm minimum order and transport restrictions
- Define regional stock and alternative routes
04
Confirm storage and replacement capability
Batteries, rubber, electronics and fluids have storage limits. A major assembly cannot shorten downtime without lifting, tools, procedures and competent personnel.
- Record temperature, humidity, dust, shock and rotation needs
- Check special tools, software and calibration
- Separate site-replaceable and specialist work
05
Revise stock from use, failures and changing lead time
Every issue should link to equipment, hours and cause. Recalculate reorder and maximum levels when lead time, fleet or production criticality changes.
- Assign item code, minimum level and owner
- Reconcile physical, issued and in-transit stock monthly
- Remove expired, incorrect and obsolete stock
Fields required in the spares register
| Asset and role | Unit, system, prime/standby, redundancy and allowable outage |
|---|---|
| Part identity | Part number, revision, applicable model and substitution |
| Demand | Service interval, failure history, installed quantity and forecast |
| Lead time | Diagnosis, supply, freight, customs and last mile |
| Site capability | Tools, lifting, software, people and replacement time |
| Control | On hand, min/max, in transit, shelf life and review date |
Three inventory errors
Copying one kit per genset
Duty, hours and commonality differ, creating shortages and excess at the same time.
Using supplier lead time only
Diagnosis, customs and last-mile access can take longer.
Stocking assemblies the site cannot replace
Without tools, procedures and people, stock does not create recovery capability.
Information required before setting stock
- Fleet records contain complete models and serial information
- Power role and allowable outage are approved
- Hours, alarms, repairs and issues are available
- Normal and adverse lead times are separated
- Storage, shelf life and rotation ownership are confirmed
- Site capability and OEM support boundaries are clear