Composites, Fiberglass & Advanced Materials calculator

Composite Defect Rate Calculator

Use this calculator to measure voids, dry spots, bridging, wrinkles, delamination, gelcoat defects, dimensional misses, porosity, or trim damage against inspected output.

What this calculator does

  • Calculate defect rate for composite layup, cure, trim, inspection, or finishing operations.
  • tracking composite manufacturing defect rate
  • The result shows actual defect rate and gap to target.

Formula used

  • Composite Defect Rate = composite defects found ÷ composite parts or features inspected × 100
  • Gap to target = Composite Defect Rate - target composite defect rate

Inputs explained

  • composite defects found: Count defects, nonconformances, inspection findings, NDI indications, cosmetic flaws, or MRB records.
  • composite parts or features inspected: Use parts, panels, plies, bondlines, coupons, or inspection features checked in the same scope.
  • target composite defect rate: Use the control-plan, customer, launch, or historical defect-rate target.

How to use the result

  • Use it for quality gates, root-cause prioritization, containment decisions, and process improvement tracking.
  • Treat the result as a planning estimate until it is checked against the approved laminate schedule, material datasheets, ply books, resin batch records, tool condition, cure logs, inspection results, customer specification, and actual shop observations for the same part family and process.

Common questions

  • What is the composite defect rate calculator for? Use this calculator to measure voids, dry spots, bridging, wrinkles, delamination, gelcoat defects, dimensional misses, porosity, or trim damage against inspected output.
  • What information should I enter? Enter composite defects found, composite parts or features inspected, and the target percentage from the control plan, customer specification, launch goal, or historical benchmark.
  • What does the result tell me? The result shows actual defect rate and gap to target.
  • When is the result only an estimate? Treat the result as a planning estimate until it is checked against the approved laminate schedule, material datasheets, ply books, resin batch records, tool condition, cure logs, inspection results, customer specification, and actual shop observations for the same part family and process.

Last reviewed 2026-05-12.