Exact-spec manufacturing from customer drawings
Build-to-Print Cable Assembly Manufacturing
For programs where the customer drawing, BOM, and process notes are the manufacturing authority.
Build-to-print means EDPcable manufactures strictly to the customer-approved drawing, BOM, and process requirements. If manufacturability, material availability, or process differences create a change suggestion, EDPcable notifies the customer in writing and waits for approval before implementation. This model fits released designs, registered products, multi-factory programs, and transfer projects where uncontrolled optimization would create risk.
Capability scope
Best fit when the customer drawing is mature and should not be changed freely. The released package defines materials, cut and strip dimensions, the approved crimp, solder, IDC or other termination method, shielding and strain-relief construction, critical-to-quality checks, and final electrical release. Incomplete drawings should run through engineering review or DFM first.
Incoming materials and connector references are checked against the released BOM before work begins
Cut, strip, termination, shielding, strain relief, labeling, and inspection follow the approved drawing and work instructions
Critical dimensions, workmanship points, electrical checks, sampling, and output records are defined by the control plan
Substitutions or process changes require the agreed review path; EDPcable owns execution while the customer retains design authority
Process Flow
| Step | Station / Action | Control Point | Output Record |
|---|---|---|---|
| Product-data review | Resolve drawing, BOM, connector application specifications, tolerances, and acceptance sources | Missing or conflicting inputs are identified before route release | Input review record |
| Route selection | Choose only applicable preparation, termination, protection, marking, and test operations | Product construction mapped to each operation | Process-flow revision |
| Material and tooling match | Confirm specified cable, contacts, housings, accessories, and method-specific tooling inputs | Part and revision identity agree with the controlled route | Material/setup check |
| First-piece setup | Execute the route and inspect named CTQs before continuing | Datums, orientation, termination, and protection features checked | First-piece result |
| Repeated assembly | Run the approved sequence with in-process checks at the fault's point of creation | Check frequency and method come from the project plan | Traveler or in-process record |
| Electrical/mechanical release | Apply the drawing-defined visual, dimensional, electrical, and conditional mechanical checks | Each result tied to its acceptance source | Release result |
| Change review | Reassess materials, method, tooling, fixture, and validation after an approved input revision | Obsolete route cannot be used for the new revision | Revision/change record |
Inspection Checkpoints
| Checkpoint | What is checked | Record | Limit |
|---|---|---|---|
| Preparation | Finished length datum, strip geometry, nick/cut criteria, conductor and shield condition as applicable | First-piece/in-process record | Criteria must come from the drawing, connector application specification, or approved workmanship basis |
| Termination | Correct contact, wire, orientation, insertion/seating, and method-specific CTQ | Termination inspection result | Visual acceptance alone may not cover a required dimensional or mechanical characteristic |
| Shield and strain relief | Shield/drain route, coverage, termination, support position, and keep-out | Visual/dimensional result | Does not establish shielding effectiveness or flex life without separate validation |
| Marking and keying | Label content/location, cavity orientation, polarization, and branch identity | Traveler or final inspection | Artwork approval does not verify electrical mapping |
| Electrical release | Wire map, continuity, short/open, and conditional methods named by the test plan | Unit or batch result, as agreed | See electrical test planning for method boundaries |
| Mechanical validation | Pull, retention, fit, or dimensional checks only when specified | Sample or validation record | Frequency and limits cannot be inferred from a general workmanship standard |
Deliverable Records
| Deliverable Record | Stage | Use | Limit |
|---|---|---|---|
| Input review record | Project setup | Identifies drawing, BOM, application specifications, missing inputs, and revision | Does not convert an incomplete definition into an approved design |
| Process-flow or work-instruction revision | Setup and change | Maps each construction feature to an operation and CTQ | Content and sharing scope depend on the project agreement |
| First-piece and in-process results | Production | Shows that named checkpoints were performed | Does not prove characteristics outside the inspection plan |
| Electrical/mechanical release result | Production | Records results against drawing-defined methods and limits | Coverage and record granularity must be stated in the plan |
| Material and revision trace | Production | Associates the agreed material/revision identity with the build record | Traceability depth must be defined during project review |
| Deviation/change record | Change | Preserves the approved disposition and affected revision | Not a substitute for customer design approval where required |
Applicable Projects
Apply the route to the actual construction: Pause process definition when the input set lacks an acceptance source, contains conflicting revisions, or asks one method to prove an unrelated requirement.
eDP cable assemblies and LVDS cable assemblies: resolve differential-pair identity, connector orientation, shield/ground scheme, branch dimensions, and the electrical plan.
FFC/FPC cable assemblies: resolve pitch, contact orientation, stiffener/exposed-contact definition, insertion route, and any wire-to-flex transition.
IDC cable assemblies: resolve ribbon pitch, conductor count, connector keying, conductor-to-cavity mapping, press operation, and strain relief.
Micro-coaxial cable assemblies: resolve cable construction, center-conductor and shield preparation, connector-specific termination, routing, and conditional high-speed validation.
Medical cable assemblies: follow the customer-controlled product requirements; the route does not itself establish regulatory or device compliance.
Related Applications
Related construction-specific methods include laser-stripped micro-coax assemblies, FPC-to-wire hybrid assemblies, and RF and impedance testing. These links describe narrower decisions; none should be added to a route unless the drawing and product construction require it.
Why EDPcable
Clear separation between customer design authority and EDPcable manufacturing execution
Written approval is required before material substitution or process change
Supports released or transfer programs across display interconnect, medical device, FFC/FPC, IDC, LVDS, and micro-coax cable work
Revision, traveler, inspection, nonconformance, and release records support the execution path
FAQ
- Does build-to-print mean no engineering review at all?
- No. EDPcable still checks drawing completeness and manufacturability. Problems are reported to the customer instead of being changed unilaterally.
- What happens if the drawing is clearly wrong?
- EDPcable stops the affected work, notifies the customer in writing, and waits for direction before proceeding.
- Can EDPcable substitute a BOM item when material is unavailable?
- Not by default. Substitution requires the customer's written approval and the agreed substitution review process.
- Can a DFM stage come before build-to-print?
- Yes. A project can start with DFM review, then switch to build-to-print once the customer-approved drawing package is mature.
RFQ Inputs
For a new build-to-print project inquiry, please share:
Controlled drawing, BOM, product revision, and approved deviations
Connector and terminal application specifications plus cable construction data
Datums, tolerances, cavity map, shield/ground scheme, branch dimensions, and markings
Required preparation, termination, protection, and packaging constraints
CTQs with the controlling acceptance source for each
Inspection/test stage, coverage, sample rule where applicable, and result format
Material substitution and revision-change review rules
Required unit, lot, material, and document traceability identifiers
Send the controlled drawing package before requesting a build-to-print quote
Complete drawings, BOM rules, tolerances, labels, inspection levels, and change-control expectations let the project run without uncontrolled deviations.