A regional cost comparison is useful only when both quotations cover the same part and responsibilities. A China foundry's casting-only price and a North American supplier's machined, inspected, delivered price are not equivalent offers. Normalize the scope before deciding which option is less expensive or easier to operate.
Define the Comparison Unit
Write one reference package containing the drawing/model revision, alloy and temper, casting route if fixed, machining and finish requirements, inspection evidence and packaging. State sample, pilot, annual and lifetime quantities separately. Identify the delivery destination and Incoterm.
Record whether the supplier is quoting a raw casting, heat-treated blank, finished component or assembly. Clarify tooling ownership, replacement, maintenance and any buyer-supplied items. A low apparent unit price may simply omit operations that another quote includes.
Separate One-Time and Recurring Costs
| Cost group | Questions to resolve |
|---|---|
| Tooling and fixtures | Which mold/pattern, cores, machining fixtures and gauges are included? Who owns and maintains them? |
| Development | Which trials, sample iterations, reports and approval activities are priced? |
| Casting and treatment | Which material condition and delivered state are included? |
| Machining and finish | Which features, operations, masking and protection are covered? |
| Inspection | Which methods, coverage, sampling and documents are priced? |
| Packaging and shipment | Which packing, handling, transport and export tasks are included? |
| Buyer-owned costs | Which inventory, qualification, coordination and import costs remain? |
For a scenario, divide the agreed one-time tooling amount by the stated amortization quantity, then add the recurring operations on the same per-part basis. Do not treat that calculated amount as a supplier quotation. Use a common currency and record the exchange-rate assumption and date.
Compare Manufacturing Evidence, Not Regional Averages
Labor, material, energy, tooling design, machine loading and operation count can affect a quotation. Without comparable project data, a generic regional percentage saving is not evidence for this part. Ask each supplier to explain the operations and assumptions behind its price instead of assigning a fixed advantage to a country.
Review capacity and scheduling for the proposed route. Distinguish a requested lead time from a committed milestone plan. Confirm dependencies on drawing release, tooling approval, samples, testing, material and shipment arrangements.
Put Logistics and Import Treatment on Their Own Lines
Use a dated freight proposal for the actual route, shipment size and service. Include insurance, handling and destination costs according to the agreed delivery terms. Avoid counting the same logistics item twice when a supplier price already includes it.
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Send the drawing, target alloy, finishing scope, MOQ, and delivery timing. Bohua will review it like a real sourcing project, not a generic contact request.
The importer or broker should determine classification, origin, entry date, valuation and applicable duty measures. Do not use a blanket tariff range or a fixed uplift on an unspecified offshore price. The import-classification checklist helps assemble the required information, but the shipment-specific determination remains with the responsible adviser.
Include Inventory and Qualification Without Inventing Precision
Transit time, release frequency and buffers affect inventory. Record the buyer's actual assumptions rather than applying a universal carrying-cost factor. Identify the costs of expediting, additional inspection or coordination only when the scenario requires them and a basis is available.
Changing suppliers can require samples, tools, process validation and customer approval. Include those one-time activities and the period during which the current source must remain available. A second-source quote does not mean the source is approved for production.
Build a Transparent Scenario Table
Use a row for each cost and columns for the two supplier proposals. Add columns for inclusion status, evidence, owner and unresolved assumption. Mark missing values as pending; do not replace them with a guessed market average.
Run sensitivity checks on assumptions that materially affect the decision, such as lifetime quantity, release size, freight arrangement or confirmed duty treatment. Show which input changes the conclusion. Keep the scenario distinct from the approved purchasing budget and from any supplier commitment.
Questions Before Award
- •Are drawing revision, delivered condition and acceptance requirements identical?
- •Are tooling and development charges separate from recurring cost?
- •Are quotation currency, validity and volume assumptions recorded?
- •Are exclusions and buyer-supplied items explicit?
- •Are logistics and duties calculated on the correct bases without duplication?
- •Are samples, qualification and change approvals included in the plan?
- •Is the delivery commitment tied to named milestones and dependencies?
- •Can every material number in the comparison be traced to a quote or an owned assumption?
FAQ
Is China always cheaper for aluminum castings?
No. The result depends on the part, route, delivered scope, quantity and supply arrangement. Compare current project quotations rather than a regional slogan.
Can a local quote justify a higher price?
It may include different services, inventory arrangements or response requirements. Identify and value those differences explicitly before comparing totals.
What should I send for a comparable Bohua quote?
Send the reference drawing package, required condition, quantities, inspection evidence, destination and delivery terms through the quote-comparison RFQ form. Keep unresolved engineering and customs assumptions visible.
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