The lowest total on a quotation is only useful when you know what it includes. Before choosing a supplier, compare the requested references, quantities, supply scope, supporting information and delivery conditions on the same basis.
Quick answer: Match each quotation to the same request line, record what is included and excluded, and separate confirmed information from questions still awaiting an answer. Compare price only after the offers cover a comparable requirement. Keep unresolved items visible instead of treating a blank field as agreement.
This checklist is for importers, distributors and engine rebuilders reviewing diesel engine parts quotations. It helps organize a purchasing decision; it does not establish whether a particular replacement part fits an engine.
1. Check that every quotation answers the same requirement
Begin with your original request and give each item a stable line number. Ask each supplier to respond against those numbers so that omitted lines, alternatives and quantity differences are easy to find.
For each line, compare:
- the requested reference and the reference actually offered, including suffixes;
- the part description and stated product condition;
- the quantity and unit, such as pieces, sets or assemblies;
- the contents and exclusions of any set or assembly; and
- the engine information used to review the request.
Do not compare a price per set with a price per piece until the set contents are listed. Likewise, a quotation for an assembly and a quotation for selected components need a scope check before their totals can be compared.
Illustrative example: Your request is for six individual components. Supplier A quotes six pieces, while Supplier B quotes one set. Record Supplier B’s offer as “contents to confirm” until it states which components and quantities the set contains. The word “set” alone does not establish that the offers are equivalent. This is a fictional example, not a customer case or a specification for an overhaul kit.
If the original request is incomplete, use the diesel engine overhaul parts RFQ checklist to organize the missing information before requesting revised quotations.
2. Separate confirmed details from open identification questions
A quotation can contain a price while still leaving the proposed part reference unresolved. Record the supplier’s identification response alongside the commercial offer.
Use three simple labels in your comparison:
- Stated in quotation: the supplier has written the information in its offer.
- Supporting information received: a relevant document, reference record or labelled photograph has been provided for review.
- To confirm: the response is missing, inconsistent or does not answer the question.
These labels describe the review status. A written statement or a photograph is not, by itself, proof of compatibility.
If a supplier offers a different number, ask it to identify the proposed reference and explain the basis for offering it against your request. Preserve both numbers in the comparison. Do not silently replace the original reference or infer interchangeability from similar wording or appearance.
Where documents are supplied, record their title or filename and which quotation line they support. A general brochure should not be recorded as item-specific evidence. If the available records still leave the application uncertain, keep that line open for clarification.
3. Put prices on a comparable basis
Record the quotation currency, unit price, quantity and line total together. Keep optional items and alternatives separate from the required order so that they are not counted twice.
Then list the additional amounts the supplier has actually quoted:
- packaging or marking charges;
- transport charges, if included;
- separately charged inspection or document services; and
- any other expressly stated charges.
Mark each amount as included, separately quoted, excluded or to confirm. A blank freight field should remain an unanswered question rather than becoming a zero-cost entry.
For your internal comparison, use the same currency and record the exchange-rate source and date if conversion is necessary. Keep the supplier’s original currency and figures visible alongside the converted amounts.
A useful worksheet subtotal is:
Required line-item amounts + separately quoted charges within the agreed comparison scope.
If charges remain unknown, label the subtotal “incomplete.” Do not present it as a final delivered cost. Record the stated delivery terms and named location exactly; ask the supplier or your logistics adviser to clarify any responsibility that remains unclear.
4. Compare packing, inspection and document scope
Translate broad phrases such as “export packing” into questions about the actual order. Ask the supplier to state the proposed packaging scope, whether its cost is included, and which requested labels or packing-list details will be provided.
Keep the review practical:
| Item to compare | Question to resolve |
|---|---|
| Packing scope | What packing is proposed for these quoted items and quantities? |
| Identification | How will packages be linked to the quotation or order lines? |
| Photos | Which product and packing photos can be supplied, and at what stage? |
| Inspection | What checks, records or separately requested services are included? |
| Documents | Which requested documents are available, unavailable or separately charged? |
If a supplier sends a packing example, ask whether it illustrates the proposed arrangement or documents your actual order. Do not treat a photograph from another shipment as confirmation of how this order will be packed.
Record inspection scope precisely. “Inspection included” leaves an open question unless the supplier explains what is checked and what record, if any, is provided. Avoid treating a broad assurance as a specified test result.
5. Distinguish quotation validity, dispatch and arrival timing
Compare dates and their starting conditions, not just a number of days.
A useful clarification is: “Does the stated lead time begin after payment, final reference confirmation, drawing approval or another event?” Record the answer beside the quoted duration.
Keep these fields separate:
- Quotation validity: when the offer expires or needs reconfirmation.
- Readiness or dispatch estimate: what the supplier expects to make available or dispatch, and from which starting event.
- Transport estimate: the stated journey estimate, where supplied.
- Buyer’s required arrival date: when your business needs the goods.
Ask whether all lines can be dispatched together and whether any quoted line has a different timing. If partial shipment is proposed, record its scope and any separately quoted cost.
Also record the proposed payment schedule and any stated warranty or return conditions. An omitted condition remains “to confirm”; do not copy terms from another supplier’s quotation or assume that a website statement applies to the offer without clarification.
6. Use a quotation comparison worksheet
Copy the following fields into your purchasing spreadsheet. Use one comparison for each request line where the offers differ, then add an order-level summary for shared packing, transport and payment conditions.
| Comparison field | Your requirement | Supplier A response | Supplier B response | Open question / next action |
|---|---|---|---|---|
| Request line and part description | — | — | — | — |
| Requested and offered references | — | — | — | — |
| Engine/application information considered | — | — | — | — |
| Product condition and stated brand | — | — | — | — |
| Quantity and unit | — | — | — | — |
| Set/assembly contents and exclusions | — | — | — | — |
| Supporting document or photo reference | — | — | — | — |
| Currency, unit price and line total | — | — | — | — |
| Packing scope and charges | — | — | — | — |
| Transport scope and named location | — | — | — | — |
| Inspection/document scope and charges | — | — | — | — |
| Quotation validity | — | — | — | — |
| Dispatch estimate and starting condition | — | — | — | — |
| Transport estimate, if supplied | — | — | — | — |
| Payment and stated after-sales conditions | — | — | — | — |
| Review decision and date | — | — | — | — |
Keep a quotation number, revision and date for each supplier. When a revised offer arrives, record what changed rather than combining figures from different versions.
Finish with one of three review outcomes:
- Comparable for commercial review: the scope and relevant questions are sufficiently clear to evaluate the offers.
- Clarification required: a missing answer could change the selection or total.
- Different scope: the offer remains an alternative and should be assessed separately.
“Comparable” is an internal purchasing status, not a compatibility approval or an instruction to place the order.
7. Request a Diesel Engine Parts Quotation
Send Volgen Power your required parts, available part numbers, engine model, quantities and destination. Include any packing, document or delivery requirements so our team can review your request and prepare a quotation with a clearly stated scope.
To prepare your request, include:
- Required parts and available references: to describe the items you want quoted.
- Engine model and available identification details: to provide application context for review.
- Quantities and units: to define the requested supply scope.
- Destination country and city: to explain where the order is required.
- Packing, document and timing requirements, if applicable: to identify the commercial conditions that need a response.
You do not need to send another supplier’s confidential prices to explain your own requirements.
Browse the Volgen Power Product Directory if you need to locate the relevant product scope.
After submitting your request, use the email or WhatsApp channel displayed on the contact page to send supporting photos or your worksheet. Keep the same contact details so the information can be connected to your request.
Ask for any unresolved line to be identified in the response. A quotation is easier to evaluate when its scope, exclusions and remaining questions are written clearly.
