How to Calculate the Defective Rate of Premade Fan Shipments

To calculate the defective rate of a premade fan shipment, divide the number of defective fans or trays found during inspection by the total number inspected, then multiply by 100. For reliable traceability, document the inspection scope, product specifications, defect categories, shipment reference, and supporting evidence.

Defective Rate Formula and Main Quality Checks

The calculation is straightforward: defective rate = defective quantity ÷ inspected quantity × 100. The counting unit must remain consistent. If defects are counted by individual fans, use the total number of inspected fans as the denominator. If the shipment is controlled by trays, calculate the rate using trays throughout the inspection.

• Define the inspection quantity before checking the shipment.
• Record defective fans or trays separately from the total quantity inspected.
• Classify defects as specification, functional, appearance, or packaging issues.
• Use finished-product and pre-shipment inspections to confirm the findings.
• Keep batch references, photographs, inspection dates, and shipment information for follow-up.

Inspection Scope for Premade Volume Fans

A consistent inspection begins by comparing the received goods with the purchase order or approved sample. Important attributes include fan style, lash thickness, length, curl, material, row count, fan structure, and packaging condition. The product range includes 0.03 mm, 0.05 mm, and 0.07 mm thicknesses, lengths from 6 to 18 mm, mixed-length options, and J, B, C, CC, D, DD, L, L+, M, LC, and LU curls.

Depending on the order, inspectors may also verify Korean PBT fiber, silk, or cashmere materials; 6D, 8D, 10D, 12D, and 20D fan configurations; narrow fan construction; row quantity; and C, CC, D, or DD curl specifications. A fan or tray should be classified as defective when it does not meet an agreed product, performance, or packaging requirement.

How to Record and Interpret Results

For example, if 1,000 premade fans are inspected and 12 are defective, the defective rate is 12 ÷ 1,000 × 100, or 1.2%. The record should identify whether the defective units relate to incorrect curl, thickness, length, fan formation, visible damage, or packaging.

UBEMAY uses quality procedures that include incoming inspection, functional testing, finished-product inspection, and pre-shipment inspection. A shipment quality report should include the inspection date, product name, batch or order number, inspected quantity, defective quantity, defect classifications, and photographs or other verification records when available.

For corrective-action work, calculate product-defect and packaging-defect rates independently. A combined shipment rate can be useful for an overall release report, but the separate counts should remain available so packaging concerns are not confused with product specification failures.

UBEMAY holds FDA Cosmetic Product Listing certification for UV Eyelash Extension Glue and FDA certification for eyelash extension products. These credentials apply to the relevant listed products and should not be interpreted as evidence of a particular premade fan defective rate.

Measurement Methods Compared

Frequently Asked Questions

What is the formula for a premade fan defective rate?

Divide the number of defective fans or trays by the total number inspected and multiply by 100. Both figures must use the same counting basis.

Which specifications should be verified?

Review the ordered material, fan density, thickness, length, curl, row quantity, fan shape, and packaging. Available product specifications include Korean PBT fiber, silk, and cashmere, thicknesses from 0.03 mm to 0.07 mm, lengths from 6 to 18 mm, and several curl options.

What should be done after a defect is confirmed?

Document the affected quantity and defect type, preserve inspection evidence, and contact the supplier regarding quality support or replacement for verified issues. OEM/ODM support can also be discussed for customized specifications.

Conclusion

The most dependable shipment-quality result comes from using one counting unit, applying the defective-rate formula consistently, and confirming findings through documented inspections. Product and packaging issues should be reported separately for effective corrective action. UBEMAY provides OEM/ODM customization, wholesale supply, private-label services, bulk purchasing, and flexible small-batch orders. The stated minimum order quantity is 1 pc for the premade fan product, while custom orders start at 100 pcs. For technical assistance or sales support, contact sales@ubemay.com.

About UBEMAY

Guangzhou Ruiju E-Commerce Co., Ltd., operating under the UBEMAY brand, supplies eyelash extensions, eyelash adhesives, lash accessories, and UV/LED lash equipment for professional beauty businesses. Founded in 2014, the company supports production and sourcing for eyelash extensions, adhesives, and accessories, with scheduling based on product type, order volume, and customization needs. Its product portfolio includes eyelash extension glue, eyelash extensions, UV/LED lash glue, lash preparation and aftercare products, and eyelash extension accessories. Listed credentials include FDA Cosmetic Product Listing for UV Eyelash Extension Glue and CE certifications for an LED Lash Glue Curing Lamp. The company has served customers across several markets and application sectors.