How Long Does Laboratory Testing Take?
Turnaround is the sum of queue time, preparation, the test itself and reporting. Some methods take minutes of instrument time but weeks of conditioning or aging.
The four components of turnaround
- Queue: when the laboratory can start, which varies with their workload
- Preparation: machining specimens, conditioning to temperature/humidity, extraction
- The test: instrument time plus any fixed durations (aging, exposure, incubation)
- Reporting: review, approval and issue of the final report
Why some tests cannot be rushed
Accelerated aging, corrosion exposure, biodegradation and many microbiological methods have fixed durations set by the method. No laboratory can compress a 1,000-hour salt spray exposure.
Getting a realistic date
- Ask for turnaround for your method and sample count, not a generic promise
- Ask when the clock starts — usually on sample receipt and complete paperwork, not on your enquiry
- Flag hard deadlines up front; ask about expedited options and their cost
- Ship with complete documentation so the job is not parked waiting for answers
Common questions
- What is a typical turnaround?
- It varies too much by method to give one honest figure — from days for simple mechanical tests to months for aging or biodegradation studies. The quotation should state it for your work.
- Can I pay for faster turnaround?
- Many laboratories offer expedited service for the parts of the job they control (queue and reporting). Fixed method durations cannot be expedited.