A work order is the central document of any workshop operation. It authorises the work, specifies what needs to be done, tracks the parts and labour used, and records the cost. When work orders are managed well, the workshop runs efficiently, costs are controlled, and every repair has a complete audit trail. When they are managed poorly - or not at all - costs spiral, parts go missing, and nobody knows what anything actually costs.
This guide explains how to manage work orders effectively, from creation through to completion and cost analysis.
What Is a Work Order?
A work order is a formal instruction to carry out maintenance or repair work on a specific vehicle or piece of equipment. It serves several purposes simultaneously:
- Authorisation - It confirms that the work has been approved and should proceed
- Specification - It defines what work needs to be done and to what standard
- Resource allocation - It assigns the work to a specific technician and allocates the required parts
- Cost tracking - It records the actual parts used and labour time, enabling accurate cost capture
- Audit trail - It creates a permanent record of what was done, when, and by whom
Without a formal work order system, workshop operations rely on verbal instructions, informal notes, and memory. This leads to work being done without authorisation, costs being missed, and disputes about what was actually done.
The Work Order Lifecycle
A work order passes through several stages from creation to completion:
1. Creation - The work order is created, either automatically (triggered by a service interval alert) or manually (in response to a driver defect report, an inspection finding, or a breakdown).
2. Assessment - The workshop supervisor reviews the work order, confirms the scope of work, identifies the parts required, and estimates the cost.
3. Parts procurement - If the required parts are not in stock, they are ordered from the supplier. The work order is held until parts are available.
4. Assignment - The work order is assigned to a specific technician with a target completion date.
5. Execution - The technician carries out the work, recording actual parts used and time spent.
6. Quality check - The completed work is inspected by the workshop supervisor before the vehicle is released.
7. Closure - The work order is closed, the actual costs are captured, and the vehicle's maintenance history is updated.
Parts and Labour Allocation
Accurate cost capture requires that every part used and every hour of labour is recorded against the work order.
Parts
When a part is issued from the stores for a work order, it should be recorded:
- Part number and description
- Quantity issued
- Unit cost (from the purchase order or stock valuation)
- Total cost
If a part is returned unused, the return should also be recorded so that the cost is reversed.
For parts purchased specifically for a job (not from stock), the purchase order should be linked to the work order so that the cost flows through automatically when the supplier invoice is received.
Labour
Labour costs are typically captured in one of two ways:
Time-based - The technician records the time spent on the work order (start time and end time, or total hours). The labour cost is calculated by multiplying the hours by the technician's labour rate.
Standard hours - Each type of job has a standard time allocation. The work order is costed at the standard hours regardless of actual time taken. This approach is common in dealership workshops and provides a useful benchmark for efficiency.
For most fleet workshops, time-based labour capture is more practical. The key is that labour time is captured consistently for every work order.
Supplier and Subcontractor Management
Not all maintenance work is done in-house. Many fleet operators use external suppliers for specialist work (engine rebuilds, gearbox overhauls, tyre fitting, electrical diagnostics) or for overflow capacity when the in-house workshop is at capacity.
When work is subcontracted, the work order should still be the central document. The subcontractor's invoice should be linked to the work order, so that the cost is captured against the vehicle and the job.
Key considerations for subcontractor management:
- Approved supplier list - Maintain a list of approved suppliers with agreed rates. This prevents ad hoc purchasing at inflated prices.
- Purchase order requirement - Require a purchase order for all subcontracted work. This authorises the spend and creates a paper trail.
- Invoice matching - Match the supplier invoice to the purchase order and the work order before approving payment. This catches billing errors and unauthorised work.
Workshop Cost Tracking
The work order system is the foundation of workshop cost tracking. When every job has a work order with accurate parts and labour costs, you can analyse:
Cost per vehicle - Total maintenance spend per vehicle over any period. This feeds into the per-vehicle P&L and supports replacement decisions.
Cost per job type - How much does a standard service cost? How much does a brake overhaul cost? Comparing actual costs to estimates reveals pricing accuracy and efficiency.
Parts usage - Which parts are used most frequently? This informs stock holding decisions and helps identify vehicles with recurring component failures.
Labour efficiency - How does actual labour time compare to standard hours? Technicians who consistently take longer than standard may need training or supervision.
Supplier performance - Which suppliers deliver on time and at the agreed price? Which ones cause delays or billing disputes?
Work Order Reporting and Analysis
A well-managed work order system generates valuable management information:
Open work orders - What work is currently in progress? What is the estimated completion date? Are there any jobs that are overdue?
Workshop throughput - How many work orders were completed in the period? What was the total value of work done?
Backlog - How many work orders are waiting for parts or technician availability? What is the impact on vehicle availability?
Cost variance - Where actual costs exceeded estimates, what was the reason? This analysis improves future estimating accuracy.
Recurring failures - Which vehicles or components are generating repeated work orders? This may indicate a systemic problem that needs investigation.
Work Order Management in T-ERP
T-ERP's Maintenance module includes a complete work order management system. Work orders are created automatically when service intervals are reached, or manually for breakdown repairs and defect rectifications.
Each work order specifies the vehicle, the work to be done, the parts required, and the assigned technician. Parts are issued from the inventory module and costed automatically. Labour time is captured against the work order. Subcontractor invoices are linked to the relevant work order.
When the work order is closed, the vehicle's maintenance history is updated automatically. The cost data flows into the per-vehicle P&L. Management reports are available in real time - not as a month-end exercise.
Frequently Asked Questions
Do I need a formal work order system for a small workshop?
Yes. Even a workshop with 2 or 3 technicians benefits from formal work orders. Without them, costs are not captured accurately, work is done without authorisation, and there is no audit trail. The administrative overhead of a simple work order system is minimal compared to the value of the data it generates.
How do I handle emergency repairs that need to start immediately?
Emergency work orders can be created quickly with minimal information and completed retrospectively. The key is that a work order exists for every job, even if the details are filled in after the fact. T-ERP allows work orders to be created in seconds for emergency situations.
What is the difference between a work order and a purchase order?
A work order authorises and tracks the maintenance work. A purchase order authorises and tracks the purchase of parts or services from a supplier. In a well-managed workshop, every purchase of parts or subcontracted services is linked to a work order, so that the cost is attributed to the correct vehicle and job.
How do I manage warranty claims on parts?
When a part fails within its warranty period, the work order for the original fitment provides the evidence needed for the warranty claim - the part number, the fitment date, the vehicle, and the mileage at fitment. T-ERP stores this information against the work order and makes it retrievable for warranty claims.
Can work orders be used for pre-trip inspections?
Yes. Pre-trip inspection checklists can be configured in T-ERP and completed by drivers via the mobile app. Any defects identified during the inspection automatically generate a maintenance request, which can be converted to a work order for the workshop to action.