A three-dimensional physical part can be fabricated from a three-dimensional digital model in a layer-wise manner via additive manufacturing (AM) technology, which is different from the conventional subtractive manufacturing technology. Numerous studies have been conducted to take advantage of the AM opportunities to penetrate bespoke custom product markets, functional engineering part markets, volatile low-volume markets, and spare part markets. Nevertheless, materials issues, machines issues, product issues, and qualification/certification issues still prevent the AM technology from being extensively adopted in industries. The present study briefly reviews the standard classification, technological structures, industrial applications, technological advances, and qualification/certification activities of the AM technology. The economics, productivity, quality, and reliability of the AM technology should be further improved to pass through the technology adoption lifecycle of innovation technology. The AM technology is continuously evolving through the introduction of PM materials, hybridization of AM and conventional manufacturing technologies, adoption of process diagnostics and control systems, and enhanced standardization of the whole lifecycle qualification and certification methodology.

1. 서 론
 2. AM 기술
 3. AM 기술 분류
 4. AM 기술구조
  4.1. 디지털 기술
  4.2. 실물제조기술
  4.3. 평가/인증
 5. 맺음말
 감사의 글
 References

• 오지원(한국생산기술연구원 뿌리산업기술연구소 융합공정소재그룹) | Ji-Won Oh
• 나현웅(한국생산기술연구원 뿌리산업기술연구소 융합공정소재그룹) | Hyunwoong Na
• 최한신(한국생산기술연구원 뿌리산업기술연구소 융합공정소재그룹) | Hanshin Choi Corresponding Author