THICK FILM ENGINEERING LIBRARY

Technical guide · Global English edition

TFC / EVIDENCE HUB / QUALITY AND EVIDENCE

Ask what a record proves—and what it does not

Document type
Evidence Hub
Updated
3 September 2026
Use
Engineering reference

Abstract

This evidence center separates context, capability review, controlled records, and customer-specific release evidence. It is designed to stop a document or image from carrying a broader claim than its printed or reviewed scope.

Index termsroute controltechnical evidencerelease decisions
Panel of quality document samples with scope and result fields visible
Fig. 1Evidence should be selected by the buyer decision it supports; a document title alone does not define scope, method or current validity.Document-sample panel · verify the original file before reliance

Central review question

Which current, scope-qualified evidence can answer the buyer's exact risk question?

Seven evidence classes, seven different jobs

Buyer evidence taxonomy
Evidence classQuestion it may answerScope qualifier required
Entity and siteWho is the brand, legal entity, and contact?Exact legal role, address, date and source
Facility and equipmentWhat physical context supports a route?Ownership/location, model/function, current photo, approved scope
Process controlHow is a critical operation released and recorded?Process version, responsibility, inputs/outputs, exceptions
MaterialWhich named material/grade/source supports the construction?Supplier document, lot/revision, storage and applicability
Inspection and testHow was a feature or function evaluated?Method, equipment context, sample, conditions, criteria, date
Product/projectWhat was built and verified for this drawing?Drawing revision, construction, lot/sample, permission and result
Shipment/releaseWhat accompanied or released the delivered lot?Customer requirement, lot linkage, exceptions, retention

Evidence has a lifecycle

  • Identified: a potential source exists, but has not been approved for use
  • Verified: identity, owner, date/version, scope and provenance were checked
  • Shareable: disclosure and redaction are approved for the named audience
  • Applicable: a reviewer linked the evidence to the exact claim or drawing risk
  • Current: expiry/review date and replacement status were checked at use time
  • Superseded or historical: retained with printed dates and never described as current

Every important claim needs an evidence row

Minimum claim-ledger fields
FieldReason
Exact claimPrevents a source from supporting a broader rewritten statement
Evidence identifier and provenanceMakes the source recoverable and reviewable
Scope and exclusionsDefines product, site, process, date, condition, or customer boundary
Owner and reviewerMakes approval and maintenance accountable
State and expiry/review dateStops an old or engineering reference from appearing current
Disclosure/redaction ruleProtects customer, supplier, employee, and controlled information
Affected pages/localesAllows a changed fact to reopen every dependent output

Request an evidence package with the RFQ

  • Product/drawing revision and the decision the evidence must support
  • Required method, standard, report, certificate, raw data, photo, or traceability fields
  • Audience, NDA, redaction and permitted distribution
  • Language, format, delivery timing, retention and renewal expectations
  • Whether supplier, partner, customer or third-party evidence is acceptable

Engineering navigation

Related engineering guides

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

    Define the method and record behind a quality decision.

  2. 02
    About ThickFilmPCB

    Review brand, endorsement and legal-entity presentation.

  3. 03
    Send drawings

    Request an application-specific engineering review.

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