Which supply route fits this part?
Vessel Core reviews every RFQ line through the same route factors: criticality, approval requirements, lead time, documentation, port and ETA, and budget logic. This tool walks through the first four for one line at a time and points to the review that usually follows — the same logic already published on the OEM vs alternative guide, applied to your case instead of read as prose.
It does not quote a price or a lead time, and it does not replace RFQ review. Treat the result as a starting point for the request, not a commitment. Go to the four questions.
What kind of component is this?
Does your owner, class or charterer require OEM for this item?
What's driving the timeline?
What documentation can you send with the request?
This is a starting point built from published review factors, not a quotation. Alternative routes are reviewed by technical fit, availability, documents and buyer approval, not only by price — and the proposed route for this line is confirmed only after RFQ review. The quotation then names the parts grade on each line: OEM through the maker's channel, OEM-equivalent, remanufactured, reconditioned or aftermarket.
When OEM usually matters most
OEM supply is usually chosen where reducing risk and getting the replacement approved outweigh every other selection factor.
Critical equipment
Main engine, safety-related equipment and assemblies whose failure has severe consequences usually call for a conservative route. That includes items such as the cylinder liner, the piston rod, crosshead bearing shells and a complete turbocharger rotor.
Strict approval
Owner, superintendent, charterer or class requirements usually make the OEM document set the only option that passes approval without further questions, especially when the item needs a class certificate.
Documentation traceability
Where traceability of origin, a match against the nameplate and the part-book page, and one document set per assembly matter, OEM supply can reduce the risk of later disputes. The same applies where warranty, claim handling or service history matter.
When a verified alternative gets reviewed
A verified alternative is worth considering where the buyer is entitled to approve it and the evidence is enough to identify the part unambiguously.
Lead time pressure
- OEM lead time is too long
- Vessel schedule is tight
- Next port call creates a hard deadline
Buyer approval limits
- Buyer allows both routes to be reviewed
- The item is not classed as critical equipment
- Approval requirements are stated in the request
Planned maintenance volume
- Planned maintenance list is large
- Items are consumable in nature
- Buyer has the right to consider alternatives
Documentation fit
- Specification can be matched against the original
- Photo, drawing and part-book page are available
- Buyer confirms the documents are sufficient
Before you send the RFQ
Does this tool replace RFQ review?
No. It is a starting point built from the same route factors Vessel Core reviews at RFQ stage — criticality, approval requirements, lead time, documentation and budget logic. The result is a direction to discuss, not a quotation or a commitment, and the proposed route is confirmed only after the request itself is reviewed.
Are alternatives always cheaper?
No. Alternative routes should be reviewed by technical fit, availability, documents and buyer approval, not only by price.
Can I ask for both options?
Yes. If your purchasing policy allows it, ask for OEM and verified alternative routes to be reviewed together with lead time and documentation notes.
What if the two routes are not equivalent on a line?
The difference is stated rather than smoothed over. If an alternative matches the specification but not the certification, or matches the dimensions but not the coating, that is written on the line so the buyer decides with the difference in front of them. Where a line has no acceptable alternative, it is quoted OEM only and says so.
