Question 1

What should buyers look for in a manufacturer's quality-management system?

Accepted Answer

A credible quality-management system (QMS) is more than a binder on a shelf — it is a documented, auditable set of processes that governs how a manufacturer controls design input, production, inspection, nonconformances, and corrective action. When evaluating a supplier, buyers should ask whether the QMS is third-party certified, how frequently it is audited, and whether audit results are available for review. Beyond certification, look for evidence that the QMS is actually practiced: are work orders travelers used on the shop floor? Are inspection records retained and retrievable? Is there a formal nonconformance and corrective-action process with documented closure? A manufacturer that can walk you through a real corrective-action record — showing how a problem was identified, root-caused, and resolved — demonstrates a living system rather than a compliance exercise. For regulated industries, ask specifically about document and revision control, material traceability, and employee training records. Contact Mikron to discuss their quality management processes and confirm current certification status for your program requirements.

Question 2

What is first-article inspection?

Accepted Answer

First-article inspection (FAI) is a formal, documented verification that the first production part or assembly — made using the actual production process, tooling, and materials — conforms to every requirement on the engineering drawing or specification. Unlike in-process checks, an FAI is comprehensive: it measures every dimension, verifies every tolerance, confirms material certification, checks surface finish, and reviews any special process requirements such as heat treatment or plating. The result is a first-article inspection report (FAIR) that provides objective evidence the manufacturing process is capable of producing conforming parts before a full production run is authorized. FAI is a contractual requirement in many aerospace and defense programs under standards such as AS9102, but it is valuable in any precision manufacturing context where a new part or a process change introduces risk. For buyers, the FAIR becomes part of the production record and provides a baseline for future audits or investigations. It is one of the most effective investments in getting production right from the start rather than discovering problems after hundreds of parts have been made.

Question 3

When should a buyer request first-article inspection?

Accepted Answer

First-article inspection is most valuable whenever a part is new to production, whenever the manufacturing process or supplier changes, or whenever a design revision is significant enough to affect fit, form, or function. For any part going into a safety-critical or regulated application — medical devices, defense systems, aerospace assemblies — FAI should be a standard contractual requirement rather than an optional add-on. It is equally prudent for high-volume commercial parts where a tooling or process change has been made: catching a systematic deviation on the first article prevents a large batch of nonconforming parts. Buyers should also consider requesting FAI when a previously approved part resumes production after a long dormancy, since tooling, personnel, and process details may have changed. The cost of a thorough first-article inspection is almost always small relative to the cost of discovering a systemic nonconformance mid-production or, worse, after parts have shipped and been assembled. Specifying FAI requirements clearly in the purchase order — including which standard governs the report format — ensures the supplier understands the expectation before production begins.

Question 4

What is a CMM and how is it used in manufacturing?

Accepted Answer

A Coordinate Measuring Machine (CMM) is a precision metrology instrument that determines the geometry of a physical part by probing its surface at programmed points and computing actual feature dimensions, locations, and orientations in three-dimensional space. A CMM consists of a rigid granite or cast-iron surface plate, a moving gantry or arm with a touch-trigger or scanning probe, and software that compares measured point clouds against the nominal CAD model or drawing values. CMMs are the standard tool for verifying GD&T callouts — true position, flatness, perpendicularity, runout, and profile — that cannot be reliably measured with hand tools. In a production environment, CMMs are used for first-article inspection, in-process sampling to monitor process drift, and final inspection of critical or tight-tolerance features. Modern CMMs can run fully automated inspection programs overnight, generating dimensional reports with pass/fail results against every tolerance. For buyers, specifying that critical dimensions be CMM-verified — and requesting the measurement report with shipment — provides objective evidence of conformance beyond an operator's visual or manual check. Contact Mikron to learn more about how we apply CMM inspection to your specific parts.

Question 5

What quality documentation might be required with manufactured parts?

Accepted Answer

The documentation package required with manufactured parts depends on the industry, the customer's quality requirements, and any regulatory standards the part must meet. At minimum, most buyers expect a certificate of conformance (C of C) — a signed statement from the manufacturer that the parts were produced in accordance with the drawing and purchase order. Material certifications (mill certs) provide traceability to the raw material heat or lot, documenting chemical composition and mechanical properties tested by the material supplier. First-article inspection reports document dimensional conformance for new or revised parts. Special process certifications — anodizing, heat treatment, welding, plating — confirm that downstream processes were performed by qualified personnel to the specified standard. For regulated industries, additional records may be required: nondestructive testing (NDT) reports, pressure test results, calibration records for inspection equipment, and operator qualification certifications. Defense and aerospace programs often specify documentation requirements explicitly in the contract or on the drawing. Buyers should define their documentation requirements in the purchase order rather than assuming a default package — and verify that the supplier's QMS can generate and retain those records reliably.

Question 6

What is material traceability?

Accepted Answer

Material traceability is the ability to link a finished part back to the specific raw material lot — and its associated certifications — from which it was made. In practice, this means a manufacturer receives raw stock with a mill certificate documenting the heat or lot number, chemical composition, and mechanical test results; retains that documentation; and maintains the connection between the material lot and the specific work orders, parts, and shipments that consumed it. Traceability matters when a material nonconformance or substitution is discovered after parts have shipped: without it, a buyer cannot determine which parts are affected, making a targeted recall or investigation impossible and forcing a much broader response. In regulated industries — aerospace, defense, medical — material traceability is a contractual and often regulatory requirement, and parts shipped without it may be rejected or quarantined regardless of their dimensional conformance. Even in commercial manufacturing, traceability is a sound quality practice that protects both the manufacturer and the buyer in the event of a field failure or warranty claim. When selecting a precision manufacturer, confirm that their receiving inspection and job traveler processes capture and retain material traceability information through to shipment.

Question 7

Why is revision control important in precision manufacturing?

Accepted Answer

Revision control ensures that the correct version of an engineering drawing is used at every stage of manufacturing, and that the record of what was built accurately reflects what was designed. Without disciplined revision control, a machinist might cut parts to an outdated drawing, an inspector might accept a part against a superseded tolerance, or a shipment might go out to a customer who has already updated their assembly to a new revision. Any of these failures can result in non-functioning assemblies, costly rework, or field failures. A well-managed revision control system assigns a unique revision identifier to every drawing change, maintains a complete history of what changed and why, and ensures that only the current approved revision is accessible on the production floor. For buyers, it means confirming that your manufacturer's QMS requires controlled distribution of drawings — not email attachments that can be printed, stored locally, and forgotten. When you release a revision, your manufacturer should acknowledge receipt, confirm that in-process work is evaluated against the change, and update inspection programs accordingly. Contact Mikron to discuss how they manage drawing revisions and document control for your program.

Question 8

How can manufacturing defects be prevented before production?

Accepted Answer

Defect prevention is far more cost-effective than defect detection, and it begins before a single part is cut. Design for manufacturability (DFM) review — where the manufacturer evaluates the drawing for features that are difficult to produce consistently, tolerances that are tighter than necessary, or geometric complexity that introduces risk — catches problems while changes are still cheap. Process Failure Mode and Effects Analysis (PFMEA) is a structured method for identifying every step in the manufacturing process where a failure could occur, estimating its likelihood and impact, and implementing controls to reduce risk. First-article inspection on the initial production parts validates that the process is capable before volume commits. Statistical process control (SPC) monitors critical dimensions during production runs, flagging drift before it produces out-of-tolerance parts. Operator training and work instruction documentation reduce variation introduced by human factors. Tooling condition monitoring and scheduled replacement prevent the gradual dimensional drift that worn cutters cause. Together, these practices shift quality from an end-of-line sorting exercise to a built-in characteristic of the production process. When evaluating a manufacturer, asking specifically which prevention practices are applied to your part type is a meaningful differentiator.

Question 9

What should happen when a drawing revision occurs after an order has been placed?

Accepted Answer

A drawing revision after order placement is a common situation that requires prompt, structured communication between buyer and manufacturer to avoid producing parts to the wrong revision. The buyer should notify the manufacturer immediately upon releasing a new revision, providing the updated drawing and a clear description of what changed. The manufacturer should evaluate whether any in-process work is affected — parts already cut to the previous revision may need to be scrapped, reworked, or accepted under deviation if the change is minor and the parts still conform functionally. Both parties should formally agree on which revision governs the open order, and the purchase order should be updated or a change order issued to reflect the new revision level. The manufacturer's document control system should ensure the old drawing is retired from the production floor and replaced with the new revision. For changes that affect price or lead time — additional machining, different material, tighter tolerances — the manufacturer needs the opportunity to requote before proceeding. Handling revisions carelessly is one of the most common sources of shipped-wrong-revision nonconformances; a clear, mutual process for managing changes protects both parties.

Question 10

Why does ISO 9001 matter when selecting a manufacturing supplier?

Accepted Answer

ISO 9001 is the world's most widely adopted quality-management system standard, published by the International Organization for Standardization and maintained through regular revision. Certification to ISO 9001 means an independent, accredited third-party auditor has verified that a manufacturer's QMS meets the standard's requirements for process control, document management, customer focus, corrective action, and continual improvement — and that surveillance audits occur regularly to confirm ongoing conformance. For buyers, ISO 9001 certification provides a meaningful baseline assurance that a supplier has formalized, auditable quality processes rather than relying solely on individual craftsmanship or informal practices. It does not guarantee a defect-free product, but it does mean that when problems occur, the manufacturer has a structured process for identifying root cause and preventing recurrence. Many regulated industries and large OEMs require ISO 9001 certification as a minimum condition for approved-supplier status. When evaluating any manufacturer, ask for their current certificate, verify the issuing registrar's accreditation, and confirm the scope statement on the certificate covers the services you are procuring. To learn more about Mikron's quality management practices and verify current certification status for your program, reach out to their team directly.

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