Page 223 - Sách năm 2022 - Fulltext - hieu final

Kết luận: Thang điểm Sigma giúp đánh giá chất lượng xét nghiệm và theo dõi hiệu

quả cải tiến. Sau cải tiến, chất lượng của các xét nghiệm đều được cải thiện; giúp giảm hao
phí cho quá trình kiểm soát chất lượng nội bộ.

Từ khóa: Six sigma, QGI, RCA, DMAIC

APPLICATION OF SIX SIGMA IN QUALITY CONTROL OFCHEMICAL

LABORATORY

ABSTRACT

Background: Sigma Metrics is a tool to determine the quality of an assay, which can
be quantified, improved and monitored. DMAIC is a core tool usually used to drive Six

Sigma Projects to improve, and optimized processes or designs. We combined Sigma

Metrics and DMAIC in effective controlling and improving quality of biochemistry assays.

Objectives: Evaluate the Sigma Metrics of biochemical tests; analyze the root causes

of poor quality; propose and implement and assess the efficiency of improving actions.
Methods: This research is a prospective study. The IQC and EQA data of

biochemistry assays on 3 devices at the Laboratories of the Hospital of the University of

Medicine and Pharmacy at Campus 2 and Hoan My Saigon General Hospital that were

collected at 3 time points from July 2020 to June 2021, were used for Sigma Metric

calculation.
Results: At the baseline, of the 60 tests, 30 tests (50%) met international standards

(Sigma ≥ 6); 7 tests (12%) achieved 5 Sigma, 7 tests (12%) achieved 4 Sigma. 16 tests

(26%) < 4 Sigma; and were the target of this improvement project. After improvement,

percentage of tests meeting international standards increased from 64.9% to 77.2% in

device 1; from 62.1% to 83.3% in device 2 and from 36.8% to 44.1% in device 3.
Percentage of tests lower than allowable standards (Sigma < 3) decreased from 31.6% to

7.9% for device 3. There were no tests lower than standard on the other 2 devices after

improvement.

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