Direct answer
Define the test strategy at contract stage — what is tested, when, with what product, against which criteria and who signs.
What this discipline delivers
- Design verification against the specification
- Module and subsystem testing during build
- Factory acceptance test with real product
- Site acceptance test under production conditions
- Performance and reliability runs before final acceptance
Method and stages
Design verification
Calculations, simulations and reviews confirming the design meets the URS.
Progressive build testing
Subsystem tests catching faults before assembly hides them.
Acceptance testing
FAT and SAT with documented protocols and criteria.
Reliability run
Extended production run demonstrating sustained output and availability.
Engineering and project considerations
- Test protocols agreed before build, not written during FAT
- Real product and real packaging materials are required for meaningful tests
- Reliability runs reveal the failures that short tests never show
- Payment milestones should be tied to test outcomes
- Deviations recorded and closed formally
What to prepare before engaging engineering companies
- Test protocols with pass/fail criteria
- Product and material availability for tests
- Attendance plan for buyer engineering and operations
- Deviation management procedure
What to measure
Frequently asked questions
Can FAT be skipped to save time?
It can be, and the schedule saving is typically repaid several times over during commissioning, when corrections happen on your site instead of the supplier's.
Related engineering knowledge
Independent, buyer-side and supplier-neutral
Global B2B Group does not sell machines and does not represent equipment manufacturers. This material is published to help industrial organisations define the problem, prepare the specification and structure the investment before engineering partners are selected.