THICK FILM ENGINEERING LIBRARY

Technical guide · Global English edition

TFC / QUALITY HUB / QUALITY

Quality is a decision system, not a badge wall

Document type
Quality Hub
Updated
3 September 2026
Use
Engineering reference

Abstract

Use this hub to identify what must be checked, when it is checked, who owns the decision, and which record can support it. A method applies only to the construction, conditions, equipment context, scope, and acceptance criteria actually reviewed.

Index termsroute controltechnical evidencerelease decisions
Representative reliability laboratory scene with an engineer inspecting ceramic circuit panels
Fig. 1A useful quality system connects the drawing requirement to a named method, result, disposition and traceable record.Representative engineering scene · not order-specific evidence

Central review question

Which method and record provide enough evidence to accept this drawing-specific risk?

Follow the product through six decisions

Quality decision map
Decision pointTypical questionRecord class to define
IncomingIs the material/component the released identity and condition?Receiving inspection, supplier document, lot/status record
In processDid the critical layer or operation stay inside its control boundary?Traveler, profile, measurement, visual or exception record
DimensionalDoes the output match drawing datums and interfaces?Method, equipment context, measured result and disposition
ElectricalDoes the circuit perform under the defined test condition?Fixture/method, units, limits, raw result and release status
Reliability/applicationDoes the construction survive the agreed risk exposure?Protocol, sample, condition, criteria and report
ReleaseAre revision, lot, results and exceptions tied together?Final inspection, nonconformance closure, shipment evidence

A test name is not a complete method

  • Purpose and construction under test
  • Applicable source, procedure and revision
  • Sample preparation, fixture, datum, probe or sensor location
  • Equipment identity and calibration context where relevant
  • Environment, stabilization, sequence, units and calculation
  • Acceptance authority, sampling, uncertainty or repeatability context
  • Raw data, report, retention, redaction, exception and disposition route

Select evidence from drawing risk

A heater, resistor network, sensor track and hybrid circuit do not need the same evidence package. Begin with the functions whose failure matters to the assembly, then trace each function back to a material, geometry, process, interface and measurable output.

The control plan should distinguish routine release checks from qualification, characterization, audit and failure-analysis work. It should also state when work is owned, controlled through a partner, or supplied as customer evidence.

Ask for evidence by decision

  • Name the drawing feature or risk the evidence must support
  • State the method/standard if mandated, including revision and deviations
  • Define sample size, conditions, units, limits and report fields
  • State whether raw data, certificate, photo, traceability or retention is required
  • Agree disclosure, redaction, language and delivery timing before quotation

Engineering navigation

Related engineering guides

Continue from the next relevant design or verification decision.
  1. 01
    Quality and evidence

    Find the buyer-facing evidence access and disclosure map.

  2. 02
    Manufacturing

    Connect inspection to the operation and failure it controls.

  3. 03
    Send drawings

    Request an application-specific engineering review.

Thick Film Engineering Library · Technical guide · Updated 3 September 2026