Near-term prototype: the must-hit deadline

• How soon do you need assembled prototypes in hand for the next review? Options: 3 business days, 5 business days, 1 week, 2 weeks, More than 2 weeks
• How many complete boards do you need for that validation milestone? Options: 1-3, 4-10, 11-25, 26-100, More than 100
• Do you already have release-ready CAD, BOM, and fabrication files? Options: Yes, all files ready, Partial, some files still iterating, No, files need work
• Tell me about the specific validation steps that must be completed at that milestone, for example functional test, thermal cycling, or compliance checks.
• Which deliverable, if late, would cause you to miss the product review? Options: Final assembled boards, Incoming inspection records, DFM report, Functional test results, Other

Where the design gets most nervous

• If the first prototype misses the key validation window, what breaks next in your program?
• Walk me through the highest-risk component types on this board and the places you worry about yield or manufacturability most.
• Approximately how many fine-pitch BGA packages and 0201 passives are present on the assembly? Options: No fine-pitch BGA or 0201, 1-5 of either type, 6-20, 21-100, More than 100
• Describe any known thermal, layer stack-up, or PCB thickness constraints that affect reflow or handling.
• Which single PCB assembly failure would make you cancel a production ramp if it appeared in the trial? Options: Persistent tombstoning, BGA solder bridging or voiding, Functional test failures, Traceability gaps, Other

Parts, procurement, and the hidden supply risks

• Tell me about the last time a part delay pushed a prototype past its deadline, and what the downstream consequence was.
• Who owns component sourcing for this build and ongoing production? Options: Your team owns full sourcing, The assembler sources full BOM, Split responsibilities by component class, Third-party distributor manages sourcing
• Do you expect the assembler to source any of the following component groups? Options: Passive discretes (0201/0402), BGAs and high-density BGAs, Custom or allocated ICs, No, we will supply all parts, Other
• How many long-lead or allocated components are on the BOM today? Options: None, 1-5, 6-20, 21-50, More than 50
• If a critical component cannot be sourced within your deadline, what fallback will you accept? Options: Approved equivalent part, Delay the build, Redesign to alternative part, Split supply between vendor and our stock

How you'll judge the first build

• Which acceptance metric, if missed on the trial run, would cause you to withhold payment or reject the run? Options: Yield below threshold, No incoming inspection records, Functional test failures, IPC workmanship not met, Traceability missing
• Which IPC workmanship class do you require for this assembly? Options: Class 1 - General electronics, Class 2 - Dedicated service electronics, Class 3 - High reliability mission critical
• Which inspections and test evidence must accompany the trial lot? Options: High-magnification solder images, AOI reports, X-ray results, ICT/functional test records, Incoming inspection report, Full lot traceability
• What yield threshold do you require on the trial lot to consider production approval? Options: 100 percent, 98-99 percent, 95-97 percent, 90-94 percent, Below 90 percent requires review
• Do you require serialized lot traceability and retention of incoming inspection records for each lot? Options: Yes, serialized traceability required, Traceability but not serialized, Not required for prototype, Unsure, need guidance
• If the trial shows a 5 percent rework rate on critical assemblies, will you proceed to production, pause for tuning, or cancel? Options: Proceed to production, Pause and tune process, Require repeat trial, Cancel the project

Operational readiness, the practical gating items

• Which missing resource today would prevent us from starting a trial this week? Options: Complete BOM with approved alternates, Finalized assembly drawings, Test fixture or golden unit, Required approvals or audit clearance, None, we can start immediately
• Are your Gerber, ODB++, or IPC-2581 files finalized and approved for manufacturing? Options: Yes, all finalized, Files need minor edits, Major layout work remains, Not sure which format will be delivered
• Do you have a golden unit, functional test fixture, or automated test scripts ready to hand over for the trial? Options: Golden unit and fixture ready, Only golden unit, Only test scripts, No test assets ready
• Who in your organization will act as the single point of contact for engineering changes and urgent decisions during the trial? Options: Senior design engineer, Supply chain manager, Quality manager, Program manager, Other
• Are there regulatory, contractual, or supplier audit approvals that must be completed before a trial for this assembly? Options: Yes, regulatory approval required, Yes, supplier audit required, Yes, NDA or contractual signoff required, No approvals required
• If an approval is missing, how long does it typically take your team to secure it? Options: Less than 48 hours, 3-7 business days, 2-4 weeks, Longer than a month

The other paths you might take

• Which alternative are you most inclined to choose right now instead of onboarding an external assembler? Options: Keep incumbent assembler, Move to internal assembly, Send to offshore high-volume partner, Delay the project, Other
• List any incumbent vendors or internal teams you are actively evaluating or planning to evaluate.
• What would have to be true about your current approach for you to keep it rather than switch vendors?
• Has anyone on your team proposed solving this by expanding internal assembly capability, and if so what was the primary rationale? Options: Yes, cost reasons, Yes, control of IP, Yes, lead time concerns, No internal proposal made
• Which vendor shortcoming would immediately rule them out of consideration? Options: Cannot meet IPC class requirement, No incoming inspection documentation, Unable to source critical components, No US-based traceability, Unacceptable lead times

Who must sign off and who will execute

• If the trial uncovers issues that require a redesign, who has authority to pause the program or demand a rework? Options: VP Engineering, Director of Supply Chain, Quality Manager, Program Manager, Cross-functional committee
• Who will sign production approval after a successful trial, and what evidence must they see to sign?
• Describe who inspects solder quality under magnification and the checklist or standard they use for pass/fail.
• How many people across procurement, quality, and engineering need to provide formal signoff for production? Options: 1-2, 3-4, 5-7, More than 7
• Which contact can approve emergency change control requests during the trial window? Options: Design engineer, Quality manager, Procurement lead, Program manager, Other
• If a DFM change is required, can your team accept a revised board within two weeks and still meet internal milestones? Options: Yes, within two weeks, Yes, but needs negotiation, No, change window is longer, Unsure

Timing, cost sensitivity, and next steps

• If the trial proves the build, what immediately needs to change to start production the following week?
• What is your target per-board cost for the prototype run? Options: Under $50, $50-$150, $150-$500, Over $500
• What is the typical budget your team sets aside to qualify a new assembler? Options: No budget, need to justify, Under $5,000, $5,000-$20,000, More than $20,000
• How quickly can your team issue a purchase order after trial acceptance? Options: Immediately, 1-3 business days, Within 2 weeks, Longer than 2 weeks
• Are there milestone payments or internal approvals that could delay ordering even after signoff? Options: Yes, capital approval needed, Yes, procurement windows limit orders, No, order can be placed immediately, Unsure
• Realistically, what is your target date to complete the trial and reach a decision? Options: Within 1 week, 1-2 weeks, 2-4 weeks, More than 4 weeks

• Solution Walkthrough — Prototype to Production Alignment

• Confirm the current state and its cost
• You confirm the dated prototyping plan delivers prototype boards in time for the next validation milestone and that the plan accounts for sourcing risk.
• Provide a tailored prototyping plan and production pathway for the provided board, with dated lead times, acceptance criteria, and a trial build quote delivered within 48 hours.
• You confirm the seller's demonstrated process controls and sample evidence address the fine-pitch BGA and 0201 yield risks for your board.
• Map the prototype timeline to your validation milestones
• Share the BOM, Gerbers, panelization preferences, and the target validation date for the revision to be trialed.
• You agree to the acceptance criteria and trial success metrics that will determine commitment to volume production.
• Deliver example incoming inspection records, solder-join images, and reflow profiles from comparable fine-pitch BGA builds for buyer review.
• Prove assembly capability on your board
• You and the seller agree the same controlled process can scale to weekly production runs meeting IPC Class 3 quality and traceability requirements.
• Demonstrate the production pathway and ramp controls
• Confirm which board revision will be used for the trial and sign the acceptance criteria document to lock the trial scope.
• Schedule the trial build week and the production ramp gating review within two business days of accepted trial criteria.
• Agree acceptance criteria and trial success metrics
• Validate alignment with a direct question
• Commit next steps and scheduling

• Solution Walkthrough — Prototype to Production Alignment
• Solution Experience Deck
• Solution Brief — Prototype to Production Pathway

• meeting
• slides
• document

• Quick-turn Prototype Assembly (3–5 business days)
• Trial Assembly Build (customer board sample)
• Volume Production Assembly (hundreds to low thousands)
• IPC Class 3 High‑Reliability Assembly
• Fine‑pitch BGA Placement and Reflow
• 0201 and Microcomponent Placement
• Mixed SMT and Through‑Hole Assembly
• Turnkey Component Procurement and Kitting
• Incoming Inspection with Documentation
• Automated Optical Inspection (AOI) Pass
• X‑ray Inspection for BGAs and Hidden Joints
• Batch Yield Tracking and Yield Reports
• Localized Rework and Reflow Repair
• Lot Serialization and Traceability Records

Quick-turn Prototype Assembly (3–5 business days)

• Do you need a 3-business-day or 5-business-day turnaround for this prototype revision? Options: 3 business days, 5 business days, Either within 3-5 days
• Name the PCB revision and filename set (Gerber, BOM, pick-and-place) you will upload for the quick-turn.
• Provide the prototype quantity required for this run (e.g., 5, 10, 20). Options: 5, 10, 20, Other
• List any hard-to-source parts on your BOM that could block a 3–5 day delivery.

Trial Assembly Build (customer board sample)

• Which trial lot size do you want for the initial customer board sample? Options: 5 boards, 10 boards, 20 boards, Custom
• Specify the exact board revision and the BOM references to be used for the trial.
• What acceptance criteria will confirm the trial assembly is acceptable (reference: solder inspection, BGA X-ray, functional test pass)? Options: AOI pass + visual at 10x, X-ray with voiding <20%, Functional test pass 100%, Custom
• Who on your team will be the authorized sign-off for trial acceptance and what is their role?

Volume Production Assembly (hundreds to low thousands)

• Estimate the weekly unit run-rate you expect in steady-state production (e.g., 500/week). Options: 100-499, 500-999, 1,000-2,499, Custom
• Outline the expected ramp timeline from trial acceptance to first full weekly run (in weeks).
• Detail any panelization constraints that must be preserved for production (panel dimensions, depanel method, fiducials).
• Select the preferred responsibility split for component sourcing in volume (who supplies what). Options: Buyer supplies full kit, Seller turnkey procurement, Split by critical parts, Custom arrangement

IPC Class 3 High‑Reliability Assembly

• For which board revisions or serial ranges do you require IPC Class 3 workmanship?
• Attach or name the specific IPC or J-STD documents you want enforced (e.g., IPC-A-610 class 3, J-STD-001).
• What evidence will validate IPC Class 3 acceptance (signed IPC report, operator certifications, process logs)? Options: Signed IPC-A-610 inspection report, Operator certification records, Process control charts and logs, Custom
• Indicate any additional environmental or handling constraints for Class 3 boards (humidity control, ESD protections, dry-pack).

Fine‑pitch BGA Placement and Reflow

• Explain the BGA package types and ball-pitches present on the BOM that need fine-pitch handling.
• Will you require X-ray coverage on those BGA types during trial or production? Options: 100% X-ray for BGAs, Statistical X-ray sampling, X-ray on failure only, No X-ray required
• Describe the reflow profile limits or paste alloy notes provided in your assembly notes.
• Are any special stencil aperture or solder paste recommendations included in your stencil drawing? Options: Yes, fine-aperture stencil, Standard aperture, Custom paste alloy required, No

0201 and Microcomponent Placement

• How many 0201 components are on the critical nets of your board (approximate count)? Options: 0, 1-20, 21-100, 100+, Unknown
• Do you require high-magnification AOI or manual microscopy specifically for 0201 inspection? Options: High-mag AOI, Manual microscopy, Both, No special inspection
• Name any process notes for 0201 rework or placement tolerances on the assembly drawing.
• Indicate if you will provide special feeders or we should prepare dedicated 0201 feeding setups. Options: You provide feeders, Seller provides feeding setup, Shared responsibility, Not required

Mixed SMT and Through‑Hole Assembly

• Choose the through-hole method required for your connectors and sockets (wave, selective, hand-insert). Options: Wave solder, Selective solder, Hand insertion, No through-hole
• Confirm whether ICT should run before or after through-hole soldering on hybrid boards. Options: ICT after through-hole, ICT before through-hole, Functional test only, Custom
• State any fixturing or masking requirements for wave or selective solder operations.
• Who will provide any mechanical fixtures or assembly jigs needed for mixed-technology boards?

Turnkey Component Procurement and Kitting

• Will you require full turnkey procurement for the BOM or only selective kitting? Options: Full turnkey, Partial turnkey, Buyer-supplied kit, Buyer supplies critical only
• Outline any approved manufacturer list or vendor restrictions we must follow during procurement.
• Detail required supply-chain documents to accompany kits (COA, RoHS, country of origin). Options: COA, RoHS declaration, Country of origin, Other
• Select the kitting method you prefer for production (per-board, per-panel, bulk). Options: Per-board, Per-panel, Bulk, Custom

Incoming Inspection with Documentation

• For incoming components, which sampling plan do you require (e.g., 100% for critical, ANSI/ASQ Z1.4)? Options: 100% for critical, ANSI/ASQ Z1.4, Custom sampling plan, No sampling
• Attach the document types that must accompany incoming lots (packing list, COA, C of C). Options: Packing list, COA, Certificate of Conformance, RoHS doc
• What evidence will validate incoming inspection acceptance for critical components (measured dims, COA match, test reports)? Options: Measured dims & photos, COA match, Electrical bench test, Other
• Indicate quarantine and disposition preferences for nonconforming incoming components. Options: Return to supplier, Rework with approval, Use approved alternate, Hold for evaluation

Automated Optical Inspection (AOI) Pass

• Explain which AOI checks must be run on every board (component presence, polarity, fillet, tombstone). Options: Presence, Polarity, Fillet, Tombstone
• Describe your AOI tolerance thresholds or golden-board references we should use.
• Are AOI images and reports required to be attached to the lot traveler for each run? Options: Yes, images attached, Summary report only, No AOI reports required
• How many board sides require AOI coverage (top, bottom, both)? Options: Top only, Bottom only, Both

X‑ray Inspection for BGAs and Hidden Joints

• Provide the list of component reference designators that must receive X-ray inspection.
• Specify the X-ray acceptance thresholds you require (voiding percentage, bridging limits).
• Choose the X-ray sampling plan for production runs (100%, periodic sample, on-fail only). Options: 100%, Periodic sample, On-fail only, Custom
• Identify whether 2D or 3D CT analysis is required for failure analysis. Options: 2D X-ray, 3D CT, Start with 2D then escalate

Batch Yield Tracking and Yield Reports

• How often do you want yield reports during ramp (daily, weekly, per-lot)? Options: Daily, Weekly, Per-lot, Custom
• Indicate the key yield metrics to include in reports (First Pass Yield, DPMO, rework rate). Options: First Pass Yield, DPMO, Rework rate, Custom
• Provide the data fields you require in each report (component ID, defect type, operator, line shift).
• Who on your side will receive yield escalations and what is the escalation contact method?

Localized Rework and Reflow Repair

• Select which defect types are allowed for localized rework during trial (solder bridges, lifted leads, tombstoning). Options: Solder bridges, Lifted leads, Tombstoning, No rework
• Provide your maximum allowed rework actions per board before a board is scrapped.
• Confirm whether rework logs and photos must be appended to the lot traveler. Options: Yes, photos and logs, Log only, No documentation required
• Describe any rework actions that are prohibited on this assembly (e.g., no hot-air on BGAs).

Lot Serialization and Traceability Records

• Which serialization scheme do you require (per-board serial, lot ID with ranges, UID)? Options: Per-board serial, Lot ID with ranges, Unique device identifier, Custom
• Provide the exact data elements to be captured per serialized unit (BOM rev, test results, operator ID, date code).
• Specify the retention period and format for traceability records (digital CSV, PDF, MES integration). Options: 1 year, 3 years, 7 years, Custom
• Identify label requirements for serialized units (QR code, human-readable serial, tamper-evident label). Options: QR code, Human-readable serial, Tamper-evident label, None

• current_state
• decision_readiness
• desired_state
• success_criteria
• gaps
• stakeholders
• stakeholders
• gaps
• decision_readiness
• current_state
• desired_state
• success_criteria
• success_criteria
• desired_state
• stakeholders
• decision_readiness
• current_state
• gaps
• decision_readiness
• current_state
• decision_readiness
• decision_readiness
• decision_readiness

• Master Services Agreement (MSA)
• Statement of Work (SOW) — Trial & Ramp
• Order Confirmation / Purchase Agreement
• Quality & Acceptance Criteria Addendum
• Warranty, Traceability & Certificate of Conformance
• Component Sourcing & Procurement Agreement
• Change Control & Engineering Change Order (ECO) Procedure
• Trial Build Acceptance Confirmation

• Go-live Health Check (weeks 1-4)
• First Measurement Review (weeks 4-10)
• Acceptance Gate Review (around day 90)
• Quarterly Quality and Support Review (ongoing)

• Export the quarter's lot traceability and inspection records to the shared repository and confirm access links.
• Create corrective action tickets for the top two root causes and set resolution target dates.
• Update the component lead-time matrix and flag at-risk parts for expedited sourcing or approved substitutes.
• Restate numeric acceptance criteria
• Buyer records a documented acceptance decision per the criteria in Trial Build Evaluation.
• If any criteria failed, remediation actions, verification steps, and resolution dates are agreed and recorded.
• All required inspection and traceability documentation delivered to the shared workspace.
• Publish the acceptance decision and outcome report to the shared workspace with links to inspection records.
• Open remediation workstreams for any failed criteria with verification checkpoints and target close dates.
• Export and archive lot traceability and incoming inspection records into the agreed repository and confirm access.
• Trend review of quality and delivery metrics
• Agree priorities for quality and process improvements for the coming quarter.
• Confirm recent nonconformances are closed and verification evidence is recorded.
• Ensure traceability and inspection documentation remain current and accessible.
• Publish the prioritized enhancement backlog with estimated effort and target quarter for each item.
• Schedule pilot runs or process-change trials for the top improvement and define verification criteria.
• Re-confirm success criteria and owners
• Named owners confirmed for weekly production windows, incoming inspection, lot traceability, and escalation routing.
• Incumbent wind-down path confirmed and archival status recorded.
• Open launch blockers logged with owners and target remediation dates.
• Publish the go-live checklist with owners and target dates to the shared workspace.
• Open a shared quality channel for nonconformance and improvement requests and invite relevant stakeholders.
• Schedule a 48-hour triage for any critical launch nonconformances discovered in the first runs.
• Present first-period outcome data versus targets
• Determine whether first-pass yield and on-time delivery are on track to meet Trial Build Evaluation targets and identify gaps.
• Assign corrective actions with owners and completion dates to address the top root causes.
• Confirm timeline to the acceptance gate review and required evidence for that meeting.
• Publish the measurement report comparing yield, on-time delivery, and prototype turn time to Trial Build Evaluation targets.
• Present outcome data against each criterion
• Review and prioritize enhancement requests
• Deployment and process validation
• Root cause diagnosis for gaps
• Document pass or fail per criterion and buyer decision
• Early operational signals and blockers
• Nonconformance closure and verification
• Nonconformance triage and severity review
• Traceability and documentation updates
• Agree remediation plan for any failed criteria
• Incumbent assembler wind-down
• Component sourcing and lead-time performance
• Agree corrective actions and timeline to acceptance gate
• Close loop on documentation and traceability handover
• Agree next-quarter checkpoints and shorter cadence items
• Agree immediate remediation actions