Quality Systems
Systematic quality control at every stage of production
Built-In Quality, Not Inspected-In
SIKING's quality system is designed around one principle: quality must be engineered into every process, not caught at the end of the line. Our four-stage inspection protocol and enterprise grading system ensure consistent, measurable results.
DPPM
Defective parts per million — fewer than 1 defective unit per 1,000 produced
First-Pass Yield
Percentage of units passing inspection on first attempt
Acceptance Rate
Customer acceptance rate on shipped orders
Four-Stage Quality Control
Every part goes through systematic quality gates — from raw material arrival to final shipment.
Incoming Quality Control
Raw material verification before production begins. Material certificates, hardness testing, physical property validation.
Learn more →In-Process Quality Control
Monitoring during production. First-article inspection, dimensional checks, process parameter verification.
Learn more →Final Quality Control
Finished product inspection. Full dimensional verification, visual inspection, functional testing where applicable.
Learn more →Outgoing Quality Control
Pre-shipment audit. Sampling per AQL standards, packaging verification, documentation completeness check.
Learn more →Documented Compliance
ISO-certified quality management with enterprise standards that exceed baseline requirements.
ISO Certifications
ISO 9001:2015 Quality Management System and ISO 14001:2015 Environmental Management System certified.
View certifications →Enterprise Standards
SK9002A — SIKING's proprietary quality grading system established in 1996, revised 2009.
Learn about SK9002A →Compliance Documentation
RoHS and REACH documentation available. Material declarations provided upon request.
View compliance →Need Quality Documentation for Your Qualification?
We provide inspection reports, material certificates, certificates of conformance, and dimensional reports for every order.