Three suppliers can answer the same RFQ and price three different jobs. One includes passivation and inspection reports. One excludes them. One assumes a larger annual release than the customer requested. Their totals look comparable because they arrive in the same currency. They are not.
The comparison must show the work each supplier priced, what the supplier changed or left open, and the cost and schedule effect of those differences. That record lets engineering judge compliance, purchasing negotiate the right gaps and estimating carry a supported supplier cost into the customer quote.
Start with the package each supplier received
Build the comparison from the issued supplier RFQ, not from the returned prices. Record the part or work package, drawing and specification revisions, quantity, requested delivery, ship-to location, quality documents and response deadline. Then show which package reached each supplier and when.
The NIST MEP supplier scouting form separates technical information such as process, dimensions, tolerances, materials and certifications from business information such as volume, target price, delivery and packaging. That split makes a useful minimum for a subcontract package. A supplier needs both sets of facts to price the same work as its competitors.
Do not overwrite an earlier package when engineering issues a change. Record the change, send it to every active bidder and mark any response that still uses the old revision. A late drawing change can alter machining time, raw stock, inspection and lead time at once.
| Control | Record for every supplier | Stop the comparison when |
|---|---|---|
| RFQ identity | Internal package ID, supplier, contact and issue date | A response cannot be tied to one issued package |
| Technical baseline | Drawing, model, specification and revision | Suppliers priced different governing files |
| Demand basis | Order quantity, releases, annual volume and delivery date | A quantity assumption has no customer support |
| Quality basis | Inspection, test, certificates and traceability | A required control has no price or acceptance |
| Commercial basis | Currency, delivery point, payment and validity | The buyer cannot tell what the price includes |
Check technical compliance before ranking price
Ask engineering to classify each material requirement as compliant, acceptable alternative, exception or unanswered. Price cannot compensate for a supplier that has not accepted a customer requirement. A low quote for 304 stainless does not compete with a quote for 316L when the drawing calls for 316L.
Use the supplier wording, then record the company decision beside it. “Standard practice applies” can conceal a different weld procedure, surface finish or inspection plan. The reviewer should identify the exact difference and decide whether to accept it, clarify it or reject the response.
The American Society for Quality describes quality, cost and delivery as long-standing supplier measures and calls for evaluation such as sample, laboratory or validation testing where needed. The comparison should therefore treat technical acceptance as a decision with evidence, not as a score hidden inside a weighted average.
| Requirement | Supplier A | Supplier B | Supplier C | Owner decision |
|---|---|---|---|---|
| 316L material with heat traceability | Complies | 304L proposed | Complies | Reject B alternative |
| 5-axis machined ports to drawing | Complies | Complies | Unanswered | Clarify C |
| Passivation to ASTM A967 | Included | Excluded | Included | B must revise |
| First article inspection report | Included | Included | Priced separately | Accept separate C line |
| Helium leak test | Included | Unanswered | Included | Clarify B before award |
Turn assumptions and exclusions into line items
Most quote risk sits outside the supplier total. Read the notes, terms, email and marked drawings. List every assumption, exclusion and customer-furnished item. Assign an owner and a cost or schedule treatment. If the supplier excluded a required operation, add a supported cost for it or request a revised quote.
Do not bury an unresolved exception in a general contingency. The team must know whether the allowance covers passivation, material escalation, expedited inspection or an uncertain test method. A visible line can be replaced when the supplier answers. A hidden markup survives into the customer proposal without a clear release condition.
| Supplier note | What it changes | Comparison treatment | Owner |
|---|---|---|---|
| Price assumes customer-supplied forgings | Material is absent from the quote | Add current forging cost and inbound freight | Buyer |
| Leak test procedure pending | Acceptance method and cycle time remain open | Hold technical approval; request procedure | Quality engineer |
| Tooling remains supplier property | Recovery and future sourcing may depend on supplier | Record ownership; compare alternate tooling price | Commodity manager |
| Delivery begins after approved first article | Quoted lead time omits approval queue | Add internal approval duration to the schedule | Project engineer |
| Quote excludes export packaging | Delivered cost is incomplete | Add supplier revision or packaging estimate | Logistics |
Split the price into recurring and one-time cost
Separate the unit price from tooling, programming, fixtures, first article work, qualification tests and other non-recurring engineering. State whether each one-time charge applies once, per part number, per release or after a revision. The supplier total for the first order may not represent the cost of later releases.
Check ownership and life for every tool or fixture. Ask where it will stay, who maintains it, how many cycles it supports and whether the company can transfer it. A cheaper supplier-funded tool can create a larger switching cost than a customer-owned tool that appears as a separate line.
| Cost | Supplier A | Supplier B | Supplier C | Normalization question |
|---|---|---|---|---|
| Unit price, 12 pieces | $8,950 | $8,420 | $9,180 | Same quantity and scope? |
| Programming and setup | $3,600 once | Included | $2,900 per release | Once or recurring? |
| Dedicated fixture | $7,800 customer-owned | $4,500 supplier-owned | $6,200 customer-owned | Who owns and maintains it? |
| First article and report | Included | $1,250 | $1,600 | Does the customer require it? |
| Leak-test tooling | Included | Excluded | $2,100 | Can existing equipment qualify? |
Normalize quantity, releases and price breaks
Compare the quantity the customer may order, not the quantity that produces the best supplier price. Record the immediate order, expected releases, annual volume and any minimum. If a supplier quotes 50 pieces while the customer bid covers 12, request the 12-piece price or show the inventory and cash required to buy 50.
A price break can still matter. Carry it as a stated option with its own assumptions. Do not use the 50-piece price as the base cost and hope the demand arrives later. The Federal Acquisition Regulation price-analysis guidance makes the same comparison point in a formal setting: prior or proposed prices require adjustment for materially different quantities, terms and market conditions.
| Demand fact | Customer bid | Supplier A | Supplier B | Supplier C |
|---|---|---|---|---|
| Initial order | 12 | 12 | 12 | 12 |
| Annual planning volume | 36 | 36 | 60 assumed | 36 |
| Minimum order | 12 required | 6 | 25 | 12 |
| Release size in price | 12 | 12 | 25 | 12 |
| Price validity | 90 days needed | 60 days | 90 days | 30 days |
| Volume-break option | Show separately | 24: $8,350 | 50: $7,980 | 24: $8,760 |
Build landed cost from the named delivery point
Use one delivery point and one logistics assumption across the comparison. State the Incoterms rule and named place when it applies. “FOB” without a named port or place does not tell the estimator where cost and risk move from the supplier to the buyer.
The International Chamber of Commerce explains that Incoterms allocate obligations, risk and costs for transport, insurance and customs. They do not replace the contract of sale. Add the costs that fall to the OEM under the quoted rule: pickup, main carriage, insurance, duty, brokerage, domestic delivery, packaging or unloading as applicable.
Use a current freight estimate with a date and source. If dimensions or weights remain uncertain, show the basis and sensitivity. An oversized crate or hazardous classification can change the route and price enough to reverse the ranking.
| Landed-cost element | Supplier A | Supplier B | Supplier C |
|---|---|---|---|
| Quoted basis | FCA Cleveland | EXW Monterrey | DAP OEM plant |
| Recurring part cost, 12 | $107,400 | $101,040 | $110,160 |
| Pickup and main freight | $1,850 | $4,900 | Included |
| Duty and brokerage | $0 | $3,180 | Included |
| Export or protective packaging | $900 | $1,250 | Included |
| Normalized recurring landed cost | $110,150 | $110,370 | $110,160 |
Put currency, payment and escalation on one date
Translate foreign-currency quotes with a stated exchange rate and date. Apply the company’s approved hedge or planning rate when one exists. Do not select today’s most favorable rate without the treasury rule that the customer bid will use.
Payment terms affect cash, but they should stay separate from the physical landed cost. Show deposit, progress and final-payment timing. A 40 percent deposit months before delivery can matter on a large subcontract package. Use the company’s finance method for the cost of cash instead of inventing a universal penalty.
Read escalation clauses closely. Identify the index, base month, adjustable share, review date, ceiling and evidence the supplier must provide. If the quote expires before the expected award, ask for an extension or carry a visible exposure tied to the unsupported period.
| Commercial term | Supplier A | Supplier B | Supplier C | Comparison action |
|---|---|---|---|---|
| Currency | USD | MXN | USD | Convert B at approved planning rate |
| Payment | Net 45 | 40% deposit, 60% shipment | Net 30 | Show B cash timing separately |
| Validity | 60 days | 90 days | 30 days | Request extension from C |
| Material escalation | Fixed | Nickel index after 60 days | Fixed | Model B clause from base month |
| Cancellation | Actual cost to date | Non-cancellable material | 25% after release | Record exposure before award |
Turn lead time into an actual delivery date
Ask what starts the clock: purchase order, deposit, approved drawing, approved first article, receipt of customer material or final clarification. Then split the promised lead time into material, programming, production, inspection, outside processing, packaging and transit. The customer needs an arrival date. “Eight weeks” from an undefined event is not one.
Check capacity as well as cycle time. Ask which machine, line or crew will perform the work and whether the supplier has reserved the slot. The cheapest response may arrive after the customer needs the complete system. If an expedite can close the gap, show its price and the evidence behind the earlier date.
| Schedule step | Supplier A | Supplier B | Supplier C |
|---|---|---|---|
| Clock starts | PO and drawing release | Deposit and material approval | PO |
| Material availability | 2 weeks | 4 weeks | Stock |
| Programming, machining and finish | 5 weeks | 4 weeks | 6 weeks |
| First article approval | 1 week included | Starts after first part; buyer time excluded | 1 week included |
| Transit to OEM | 2 days | 6 days plus customs | Included in 1 week |
| Supported plant arrival | 8 weeks + 2 days | At least 9 weeks | 7 weeks |
Price the quality plan and supplier risk openly
Check whether the supplier and process meet the required approvals. Identify first article, source inspection, material certificates, weld records, calibration, special-process approvals, test reports and traceability. If the customer requires an approved source or a named standard, a strong general quality score does not waive that requirement.
ISO 9001 auditing guidance for external providers asks whether orders go to providers that meet defined criteria and whether the organization applies risk-based controls. Translate that principle into the quote: state the control, who performs it, what it costs and what evidence releases the part.
Use performance history where it matches the same site, process and type of work. Late-delivery and defect history can change the recovery plan, inspection level or need for a second source. Do not invent a dollar risk adjustment from a generic supplier rating. Cost a specific action or expose a specific decision.
| Risk or control | Evidence | Quote treatment | Decision |
|---|---|---|---|
| Special-process approval | Current passivation approval | Included in A and C; absent in B | B cannot advance without approved source |
| Dimensional capability | Prior first article on similar manifold | No added cost for A | A evidence accepted |
| Leak-test capacity | Fixture list and calibration record | C fixture charge remains | Approve after record review |
| Delivery performance | 12-month on-time history for this site | A 96%; C new source | Add C progress checks |
| Recovery source | Qualified alternate for raw forging | A has alternate; C single source | Record C material contingency |
Worked example: three quotes for a stainless manifold
An OEM needs 12 machined 316L stainless manifolds for a customer project. Each part has six precision ports, passivation, helium leak testing and a first article report. The manifolds must reach the assembly plant in ten weeks. Engineering sends the same drawing package to three approved or qualifying subcontractors.
Supplier B shows the lowest unit price. Its quote assumes 25 pieces, 304L material and EXW delivery. It excludes passivation and the leak test. Supplier A quotes the required material and scope but adds a customer-owned fixture. Supplier C includes delivered freight and the complete scope, but the company has not used its leak-test process before.
After normalization, Supplier B no longer has the lowest recurring cost and remains technically unacceptable until it revises the material and missing operations. Supplier C offers the earliest delivery for a $1,410 first-order premium over Supplier A, but it needs process qualification. The team can select C when the customer schedule justifies that premium and the qualification finishes before material release. A remains the approved fallback.
| Comparison result | Supplier A | Supplier B | Supplier C |
|---|---|---|---|
| Technical status | Compliant | Noncompliant material; missing operations | Compliant pending process qualification |
| Recurring landed cost | $110,150 | $110,370 before correction | $110,160 |
| One-time cost | $11,400 | $5,750 plus missing leak tooling | $12,800 |
| First-order normalized total | $121,550 | Not awardable | $122,960 |
| Plant arrival | 8 weeks + 2 days | At least 9 weeks | 7 weeks |
| Award position | Approved fallback | Revise and resubmit | Conditional selection |
Use weighted scoring after hard requirements pass
A scorecard can combine the accepted commercial choices. It cannot turn a failed material, certification or delivery requirement into an award. Apply hard gates first. Score only suppliers that engineering, quality and the project team consider capable of meeting the customer commitment.
Set weights for the work package before the team sees the preferred answer. A prototype may put more weight on technical support and speed. A stable production part may put more weight on recurring cost, capability and delivery history. The ASQ supplier-evaluation example used a cross-functional team and separate measures for quality, delivery, price and support. Your weights should come from the customer and program risk, not from that example or any universal template.
| Criterion | Weight | What earns the score | Who signs off |
|---|---|---|---|
| Technical compliance | Gate | Every mandatory requirement accepted | Engineering |
| Quality readiness | 25% | Approved process, evidence and control plan | Quality |
| Delivered recurring cost | 25% | Normalized landed cost at required quantity | Purchasing and estimating |
| Delivery confidence | 25% | Supported date, capacity and recovery plan | Program lead |
| Commercial terms | 15% | Validity, payment, escalation and cancellation fit | Purchasing and finance |
| Technical support | 10% | Fast clarifications and useful manufacturability input | Engineering |
Send one clarification log to every bidder
Write each question against the requirement or quote line that created it. Send the same scope clarification to every active bidder when the answer changes the work. A private answer to one supplier can produce a false price difference if the others still price the old interpretation.
Record who asked, who answered, the date, the response and the effect on scope, price or schedule. Require a revised quote when the answer changes a commercial commitment. An email that says “noted” does not update the total, validity or delivery date.
| Clarification | Issued to | Required response | Comparison effect |
|---|---|---|---|
| Confirm 316L applies to body and plugs | A, B and C | Written material acceptance | Technical gate |
| Price ASTM A967 passivation | B | Revised unit and lead time | Recurring cost and schedule |
| Define leak-test procedure and acceptance | A, B and C | Procedure reference and report sample | Quality gate |
| Extend validity through customer award date | A and C | New expiry date | Commercial exposure |
| Confirm plant arrival from stated start event | A, B and C | Calendar date and dependencies | Customer schedule |
Document the award and the fallback
The award record should name the chosen supplier, quote revision, scope, recurring cost, one-time cost, delivery basis, accepted deviations and open conditions. State why the team chose it and who approved each exception. Attach the comparison and source quotes to the purchase action.
Name a fallback when the customer schedule or qualification risk warrants one. State what event moves the work to that supplier and whether the alternate price and capacity still hold. A runner-up from a month-old comparison is not automatically a live recovery source.
The award decision should survive a later question from finance, quality, the project team or the customer. The FAR proposal-analysis guidance gives a useful standard even outside government procurement: use the depth of analysis that the acquisition requires, and establish why the final price is reasonable. For an OEM, that means the record must show the accepted job behind the number.
| Award field | Selected record |
|---|---|
| Supplier and response | Supplier C, quote C-1842 Rev 2 |
| Technical basis | RFQ SM-417 Rev C; all requirements accepted |
| Commercial basis | $110,160 recurring landed; $12,800 one-time; DAP OEM plant |
| Schedule | Seven weeks from PO; qualification complete before material release |
| Condition | Quality approves leak-test procedure and sample report by 18 October |
| Fallback | Supplier A quote A-991 Rev 1; reconfirm capacity if condition misses date |
| Approvals | Engineering, quality, purchasing, estimating and program lead |
Carry the chosen basis into the customer bid
Estimating needs the selected recurring cost, one-time cost, freight basis, exchange rate, lead time, validity and unresolved exposure. Map each amount to the customer bid line it supports. Do not copy one supplier total into a generic material field and leave the assumptions behind.
If the customer changes quantity, material, delivery or testing, identify the affected supplier lines and reopen them. The customer-price revision should point to the supplier response that supports it. That link matters when the customer asks for a price break or when purchasing receives a different production quantity after award.
A supplier quote may expire before the customer decides. Mark the exposure in the bid and assign someone to refresh it. The team should know whether margin includes a current fixed source, an indexed clause or an allowance that still needs confirmation.
| Supplier fact | Customer-bid use | Reopen when |
|---|---|---|
| Recurring landed cost at 12 pieces | Direct subcontract cost | Quantity, route or delivery point changes |
| Customer-owned fixture | One-time tooling line or amortization | Design or ownership changes |
| Seven-week plant arrival | Manufacturing and project schedule | Award date or qualification slips |
| 30-day quote validity | Price exposure and approval note | Customer decision passes expiry |
| Conditional process qualification | Bid risk and release condition | Quality rejects evidence or test |
Measure whether comparisons improve awards
Track the work from the first complete supplier response to an approved award basis. Separate waiting for supplier clarification from internal engineering, quality and purchasing review. Cycle time alone can improve because the team accepts more risk. Pair it with late cost changes, delivery misses and quality escapes.
Review where normalization changes the apparent winner. That result shows whether freight, scope, quantity or terms regularly distort the first view. It can also improve the next RFQ template. If suppliers repeatedly omit the same test or package requirement, fix the issued scope instead of correcting every response by hand.
| Measure | Start | Finish or event | What it reveals |
|---|---|---|---|
| Comparison cycle time | First complete response arrives | Award basis approved | Review and clarification speed |
| Clarification rate | Responses received | Questions issued | RFQ or supplier-response gaps |
| Winner changed by normalization | Raw price rank | Accepted landed-cost rank | Hidden scope and term differences |
| Post-award supplier cost change | Award cost | Final purchase cost | Weak validity, scope or change control |
| Supplier-caused schedule variance | Committed plant date | Actual plant date | Date quality and recovery performance |
| Incoming quality failure | Received lot | Inspection result | Capability and control effectiveness |
How Bourne compares subcontractor quotes
Bourne reads the issued supplier package and the returned PDFs, spreadsheets and emails. It maps each response to the same requirements, quantities and revisions, then shows missing answers, deviations, one-time charges, freight terms and schedule conditions beside the quoted price. Each extracted fact links back to its source.
Engineering decides technical acceptance. Quality reviews controls and qualification. Purchasing owns clarification and the award. Bourne prepares the comparison, tracks those decisions and carries the chosen cost and lead time into product costing. If the customer scope changes, it can identify the supplier lines that need a new response instead of rebuilding the comparison from scratch.
This works best when the customer bid drives the sourcing event. The supplier RFQ workflow starts with the bought-out or subcontract scope inside the customer request, issues a controlled package, manages questions and returns the approved award basis to the same bid.
Buğra Gündüz
Buğra Gündüz is the co-founder and CEO of Bourne and co-founder of HockeyStack. He built HockeyStack into an eight-figure AI business. At Bourne, he works with entrepreneurs and established companies to create AI products and services.