Quality Documentation Support

Manufacturing Quality Documents for CNC and Molded Parts

Quality documents should be defined according to the project stage and the evidence needed for approval. SPI can support first-article inspection, production approval, material conformity, dimensional verification, and process or validation records for CNC-machined and molded parts when these requirements are agreed before quotation or sampling.

Quick answer: FAI confirms first-part conformity; PPAP, ISIR, or EMPB supports formal production approval when required; material certificates and CoC confirm specified material or shipment conformity; dimensional and CMM reports record measured results. The required document package should be matched to project risk, customer requirements, and approval stage. For SPI's wider inspection and quality-control capability, review Quality Assurance .

Manufacturing Quality Documents for CNC and Molded Parts — Quality-document scope should be agreed before sampling or production approval so the required evidence is available at the correct stage.

First Article FAI Report

Production Approval PPAP / ISIR / EMPB

Material Evidence Certificate / CoC

Dimensional Evidence CMM / Inspection Report

Process Evidence Trial / Validation Records

First-Article Evidence

When Is an FAI Report the Right Manufacturing Quality Documents ?

First Article Inspection (FAI) is used when the main approval question is whether the first manufactured parts conform to the released drawing and agreed inspection requirements. It is especially useful before repeat production begins or after a controlled engineering change.

What It Proves

First-Part Conformity

FAI records whether the submitted part meets specified dimensions, material requirements, and defined inspection characteristics.

Typical Trigger

New or Changed Manufacturing

Typical triggers include first production-like samples, new tooling, new CNC setup, drawing revision, or supplier/process change.

Project Stage

Before Repeat Production

FAI is most useful when dimensional evidence is needed to approve a first build before routine production or shipment continues.

FAI Can Confirm	FAI Does Not Prove by Itself	Common Use
Drawing-based dimensional conformity	Long-term process capability	First sample or first production-like build
Specified material and inspection evidence	Complete production-control readiness	New tooling, setup, supplier, or revision
Measured results for agreed critical features	Full PPAP / customer approval package	Initial release before repeat production

FAI boundary: FAI proves the submitted first-article result. It should not be treated as evidence of long-term process capability or full production approval.

Need the detailed FAI report structure, drawing linkage, and inspection evidence?

Review the FAI report guide

Production Approval Route

PPAP, ISIR or EMPB: Which Approval Route Fits the Project?

PPAP, ISIR, and EMPB are used to support formal part or production approval, but they should not be treated as interchangeable document names. The required route depends on the customer, industry, project stage, submission template, and the level of manufacturing evidence requested before serial production.

PPAP

Production Approval Package

Used when the customer requires structured evidence of production readiness, dimensional results, material records, process controls, and other agreed approval elements before repeat production.

ISIR

Initial Sample Submission

Used where the customer or supply chain requires an initial-sample report or supplier approval package based on the released drawing and specified submission requirements.

EMPB

Customer-Specific First-Sample Approval

Common in customer-specific or German-language first-sample approval workflows where the required reporting format and evidence package are defined by the buyer.

Approval Route	Typical Trigger	Primary Purpose	Confirm Before RFQ
PPAP	Serial-production or customer approval requirement	Document manufacturing and production-readiness evidence	Submission level, customer template, required records
ISIR	Initial sample or supplier approval request	Submit first-sample results against defined customer requirements	Report format, drawing revision, inspection scope
EMPB	Customer-specific first-sample approval workflow	Provide the requested first-sample evidence package	Customer form, required evidence, approval stage

Approval rule: the customer requirement controls the route. Do not assume that PPAP, ISIR, or EMPB can replace one another without confirming the required submission format and evidence scope.

Need the detailed submission content or a deeper comparison of these routes?

Review PPAP documents Compare EMPB, ISIR and PPAP

For automotive programs that require customer-specific production approval, PPAP evidence, traceability, and automotive quality-system controls:

Review the IATF 16949 automotive quality framework

Material & Shipment Evidence

Material Certificates, CoC and Compliance Records

Material and conformity records show what material was supplied, which batch or shipment it belongs to, and whether specified documentation was provided. They are useful for receiving inspection, traceability, regulated material requirements, and routine shipment release—but they should not be treated as dimensional or process-capability evidence.

Quality documents with machined parts, molded components, material certificates, compliance records, and inspection paperwork on a precision manufacturing workbench — Material certificates, CoC and compliance records should be linked to the relevant material, batch, revision, shipment, or customer requirement.

Material Identity

Material Certificate / MTR

Used to document the specified metal grade, resin system, or supplier material data associated with the manufactured parts.

Shipment Conformity

Certificate of Conformity

A CoC supports shipment-level confirmation that supplied parts conform to the agreed purchase order, drawing, or customer specification.

Specified Compliance

RoHS / REACH / Customer Records

Compliance evidence may be supplied when required by the buyer, market, material system, or customer-specific documentation requirement.

Document	Typical Trigger	What It Supports	What It Does Not Prove
Material Certificate / MTR	Material-sensitive part or buyer material requirement	Material identity, grade or supplier data	Dimensional conformity or process capability
CoC	Routine shipment or customer release requirement	Shipment-level conformity statement	Detailed measured results or PPAP readiness
Compliance Record	RoHS, REACH or customer-specific requirement	Specified compliance evidence	Part acceptance beyond the stated compliance scope

Evidence boundary: material certificates and CoC confirm material or shipment conformity. They do not replace FAI, dimensional inspection, capability evidence, or formal production approval where those records are required.

Define the required certificate type, material identification, lot traceability, and customer compliance format before production or shipment.

Inspection & Measured Evidence

CMM Reports and Dimensional Inspection Records

Dimensional reports show what features were measured, how the results compare with the drawing, and whether the submitted sample or shipment matches the agreed inspection scope. They are typically requested for FAI, first-part approval, CTQ confirmation, or customer-specific dimensional review—but they should not be treated as material certification or full process-capability evidence.

CMM dimensional inspection setup measuring a precision machined part with engineering drawing and inspection report in a clean metrology lab — CMM and dimensional inspection reports should match the agreed datum logic, feature scope, sampling condition, and drawing revision used for approval.

Feature Results

Ballooned / Dimensional Report

Used to record measured values against specified drawing dimensions, tolerances, and selected inspection points.

Complex Geometry

CMM Report

Preferred where datum relationships, profile, position, flatness, or other geometry needs structured measurement evidence.

Approval Scope

CTQ / First-Article Evidence

Often requested to support first-article approval, CTQ review, or dimensional confirmation before shipment or production release.

Record	Typical Trigger	What It Supports	What It Does Not Prove
Dimensional Report	FAI, sample approval, or shipment-level dimensional review	Measured results for selected drawing features	Material compliance or long-run process capability
CMM Report	GD&T, CTQ, profile, position, or complex geometry requirement	Structured measurement evidence tied to datum logic	Automatic approval of all non-measured features
CTQ Inspection Record	Customer-defined critical feature or functional approval need	Evidence focused on agreed critical characteristics	Full PPAP package or shipment conformity by itself

Evidence boundary: dimensional and CMM reports confirm measured results for the agreed feature set and inspection condition. They do not replace material certificates, CoC, or formal capability and validation records when those are required.

Define the drawing revision, datum reference, CTQ scope, sample condition, and reporting format before inspection so the submitted evidence matches buyer expectations.

Process & Validation Evidence

Process, Trial, Capability and Validation Records

Some projects require more than first-part or dimensional evidence. Process records are used when the buyer needs proof of trial history, operating conditions, CTQ capability, traceability, or controlled readiness before repeat production. The required scope should be agreed before sampling so the correct data is collected during the actual manufacturing run.

Trial Evidence

Tool or Process Trial Records

Record sample stage, process conditions, observations, corrections, and inspection results during controlled trials or setup validation.

Process Control

Control Plan / Inspection Records

Define how agreed CTQs and process checks are monitored during production when formal control evidence is required.

Capability

Cpk / Ppk Evidence

Statistical capability may be requested for selected CTQs when repeatability must be demonstrated using production-representative data.

Traceability

Lot / Cavity / Revision Records

Link material, production batch, cavity or setup, inspection results, and drawing revision where project traceability requires it.

Record Type	Typical Trigger	What It Supports	Important Boundary
Trial / Setup Record	New tooling, process setup, or controlled sampling stage	Evidence of trial conditions, changes, and observed results	One trial does not prove long-term capability
Control / Inspection Record	Defined CTQ or production-control requirement	Evidence that agreed checks are being applied	Scope should follow the approved control requirement
Capability Study	Customer-defined CTQ capability requirement	Statistical evidence for selected characteristics	Do not apply capability requirements to every dimension by default
Traceability Record	Lot, cavity, revision, or customer traceability requirement	Links production identity to inspection and material records	Traceability alone does not prove conformity

Validation rule: collect process and capability evidence only for the characteristics, stages, and approval requirements that have been agreed for the project.

Need the deeper logic for capability studies on injection-molding CTQs?

Review Cpk quality control

For the broader quality-management framework behind controlled inspection, traceability, documented records, and production quality processes:

Review the ISO 9001 quality management framework

Before RFQ or Sampling

How to Request the Right Quality Documents

Define quality-document requirements before quotation or sampling whenever they affect inspection effort, sample quantity, submission timing, or production approval. A clear request helps SPI prepare the correct evidence without adding unnecessary documentation or discovering customer-specific requirements after parts have already been manufactured.

Input 01 Drawing & Revision

Provide the current 2D drawing, 3D CAD where relevant, and active revision.

Input 02 Project Stage & Quantity

Identify prototype, FAI, pilot, production approval, or shipment stage.

Input 03 Required Documents

State whether FAI, PPAP, ISIR, EMPB, CoC, material, or dimensional records are required.

Input 04 CTQs & Inspection Scope

Identify critical features, inspection points, datum conditions, and reporting expectations.

Input 05 Customer Forms & Approval Route

Provide required templates, submission level, portal rules, or customer-specific formats.

Input 06 Submission Timing

Define sample quantity, document due date, approval milestone, and release deadline.

Define the document package before production starts.

Send the drawing together with the required quality-document scope so SPI can review inspection, evidence, timing, and submission requirements before quotation.

Submit Drawings & Document Requirements