| 학회 |
한국화학공학회 |
| 학술대회 |
2004년 가을 (10/29 ~ 10/30, 호서대학교(아산캠퍼스)) |
| 권호 |
10권 2호, p.1226 |
| 발표분야 |
공정시스템 |
| 제목 |
Identification Vital Few Causes of Variation in an Industrial Terephthalic Acid Manufacturing Process |
| 초록 |
We propose a systematic decision procedure which helps us to identify vital few causes (VFCs) of quality problem in an industrial terephthalic acid process. The previous process improvement strategies require significant time of analysis when applied to a large-scale chemical process with complex causal relationships because they are limited to the finding of simple heuristics to identify VFCs. On the other hand, the conventional variable selection methods cannot guarantee their performance to identify the reasons of the empirical correlation. The proposed stepwise decision procedure enables to reduce analysis time since the focus is systematically shifted to the significant causes for variation. Additionally, accuracy of the identified VFCs is improved using a causal analysis based on technical knowledge as well as a correlation analysis based on a statistical hypothesis test. This procedure has been successfully applied to purified terephthalic acid (PTA) process to discover VFCs. The identified VFCs have been validated, and they have greatly contributed to improve the degraded process. |
| 저자 |
김민진1, 한종훈2
|
| 소속 |
1포항공과대, 2서울대 |
| 키워드 |
Vital Few Causes; Process Improvement; Systematic Procedure; Terephthalic Acid Process
|
| E-Mail |
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| VOD |
VOD 보기 |
| 원문파일 |
초록 보기 |
