DC contactor quote comparisons should begin with scope alignment, not a supplier ranking. Record what each quotation states about the requested item, reference revision, inclusions, exclusions, and unanswered question.
This preserves a fair review path without presenting a quoted figure or declaring a purchase decision.
Part 1. What does a quote-comparison record control?
A comparison record creates a like-for-like question set before internal review. It does not decide which supplier or contactor is suitable.
Part 2. Which scope fields should align?
Align the buyer’s requested identity, drawing or revision reference, stated scope, and document requirement before comparing responses.
| Comparison field | Record | Reason |
|---|---|---|
| Requested identity | Exact RFQ wording | Avoids comparing different requests. |
| Revision reference | Controlled drawing or record | Identifies the scope source. |
| Stated inclusion | Supplier wording as received | Keeps evidence visible. |
| Gap | Unanswered item | Produces a clarification question. |
Part 3. How should gaps be displayed?
Show a missing field as missing and assign it a clear question. The drawing-revision RFQ review can preserve the reference under discussion.
Part 4. What is stated versus inferred?
Stated information belongs to the supplier response or controlled buyer record. An inference is any selection, price, availability, or fit conclusion added beyond that evidence.
Important: Do not rank quotations or infer a technical match from incomplete scope fields. The EEVblog welded-contactor discussion is used only for its evidence-versus-conclusion boundary.
Part 5. What cannot a quote establish?
A quotation alone cannot establish a product’s compatibility, delivery availability, commercial acceptance, certification, or final approval. Those decisions need the applicable records and responsible review.
Part 6. When should comparison stop for clarification?
Pause comparison when identity, scope, revision, document request, or response field is ambiguous. A blank comparison cell is a question, not permission to assume equivalence.
Part 7. How should the question return to suppliers?
Use the DC contactor product range, CZW DC contactor line, and magnetic holding DC contactor line only as discovery routes.
| RFQ input / Buyer should provide | Why it matters | Avoid |
|---|---|---|
| Controlled request and revision | Aligns the comparison | Mixing project versions. |
| Quotation scope wording | Shows stated evidence | Filling gaps from memory. |
| Required clarification | Directs the supplier response | Ranking incomplete quotations. |
| Open decision boundary | Preserves responsible review | Calling a quote a selection result. |
Send the quote comparison for review once the open fields are controlled.
FAQ
What should buyers compare in quotations?
Compare the requested identity, revision, stated scope, documents, exclusions, and unanswered fields.
Is a lower quoted figure enough?
No. A figure without aligned scope cannot establish equivalence or a buying decision.
Which scope fields need to match?
The controlled request, revision, item wording, stated inclusions, required documents, and open questions should be compared.
How is a missing field recorded?
Record it as a gap and ask a named clarification question.
Can a product page settle a difference?
No. It is a discovery resource and does not decide the quotation scope or project fit.
What should a supplier receive after comparison?
Send the controlled RFQ reference, compared scope wording, specific gap, and bounded question.
References
- The EEVblog contactor discussion provides the Part 4 evidence-boundary language.
