Table 1.

Summary of studies on COVID-19 with operation/quality management techniques

References	Methodology / Tools used	Objective / Purpose
Bañez et al. (2020)	Six Sigma (DMAIC)	To identify factors in mitigating disease transmission
Gonella et al. (2020)	System thinking approach	To develop stock-flow diagram in healthcare services
McDermott et al. (2021)	LSS	To ensure process efficiency and patient safety
Kuiper et al. (2021)	Six Sigma	To respond to healthcare needs during the COVID-19 crisis
Hundal et al. (2021a, b)	LSS	To mitigate disruption in health care environments
Bhandar et al. (2021)	LSS, DMAIC	To ensure hospital management
Haley et al. (2021)	Systems thinking ideas	To manage social response
This Paper	Various quality management tools	To implement a system-wide integrated management plan