In brief

Agree web-inspection acceptance around identified good, bad and marginal samples, the tested material and speed range, and the complete route from an image to a decision and affected-material record. Count false accepts and false rejects separately rather than combining them into one result.

Define repetitions, acceptance limits and responsibility for reviewing uncertain or missing results before testing. Include the proposed line and result interfaces so a detected condition is checked through to the required material response.

On the production floor

Turn your production information into clearer decisions — Continuous Roll Fed Material Inspection

Plan continuous roll fed material inspection around representative good, bad and marginal samples, line presentation, lighting, reject handling and challenge criteria. Discuss an optical feasibility trial with Oxford Vision Systems. Use this guide to resolve false-accept, false-reject and challenge criteria before it limits the final system.

Discuss your application
What to record

False-Accept, False-Reject and Challenge Criteria: condition, range and effect on your process

Current condition

For each challenge, record the sample or material identity, agreed judgement, line state, imaging arrangement and observed result. Keep unacceptable material accepted, acceptable material rejected and unresolved results in separate records.

Realistic range

For Continuous Roll Fed Material Inspection, include normal production conditions, credible extremes, product or part variants and changes over time.

Effect on the system

Check that the recorded fault can be related to the affected material and that the agreed review or handling response follows. Document stops, restarts and missing-result recovery within the test scope, together with any untested conditions and remaining actions.

Before you contact us

Five questions about false-accept, false-reject and challenge criteria for your application

  1. Who can confirm this information?Identify the person responsible for false-accept, false-reject and challenge criteria in production, quality, engineering or operations.
  2. How representative is the sample?Include age, supplier, batch, environment and upstream process state where they affect continuous roll fed material inspection.
  3. What is the difficult condition?Include the slow, reflective, flexible, dirty, damaged, marginal or uncommon case that your system must still handle.
  4. How will you judge the result?Agree the method, repetitions, acceptable range, result record and the response if the observed result falls outside the agreed range.
  5. What else must be coordinated?Your final continuous roll fed material inspection scope must also account for recipe, reject and line-control interfaces, false-accept, false-reject and challenge criteria, current regulations and the conditions at your site.
Connected details

Review false-accept, false-reject and challenge criteria as part of the complete system

Question 1

Visible Defect or Measurement Definition for Continuous Roll-Fed Material Inspection

For Continuous Roll Fed Material Inspection Challenge-test checklist, describe the current position, required outcome, acceptable limits and known exceptions for visible defect or measurement definition for continuous roll-fed material inspection. That lets us compare options against your real production rather than one nominal value.

Question 2

Good, Bad and Marginal Sample Range

For Continuous Roll Fed Material Inspection Challenge-test checklist, describe the current position, required outcome, acceptable limits and known exceptions for good, bad and marginal sample range. That lets us compare options against your real production rather than one nominal value.

Question 3

Part Presentation and Production Speed

For Continuous Roll Fed Material Inspection Challenge-test checklist, describe the current position, required outcome, acceptable limits and known exceptions for part presentation and production speed. That lets us compare options against your real production rather than one nominal value.

Question 4

Optics, Lighting and Environmental Conditions

For Continuous Roll Fed Material Inspection Challenge-test checklist, describe the current position, required outcome, acceptable limits and known exceptions for optics, lighting and environmental conditions. That lets us compare options against your real production rather than one nominal value.

Question 5

Recipe, Reject and Line-Control Interfaces

For Continuous Roll Fed Material Inspection Challenge-test checklist, describe the current position, required outcome, acceptable limits and known exceptions for recipe, reject and line-control interfaces. That lets us compare options against your real production rather than one nominal value.

Question 6

False-Accept, False-Reject and Challenge Criteria

For Continuous Roll Fed Material Inspection Challenge-test checklist, describe the current position, required outcome, acceptable limits and known exceptions for false-accept, false-reject and challenge criteria. That lets us compare options against your real production rather than one nominal value.