Kaiser-Meyer-Olkin (KMO) Test for Sampling Adequacy
https://www.statisticshowto.datasciencecentral.com/kaiser-meyer-olkin/
KMO and Bartlett's Test
https://www.ibm.com/support/knowledgecenter/SSLVMB_23.0.0/spss/tutorials/fac_telco_kmo_01.html
What should be ideal KMO value for factor analysis?
https://www.researchgate.net/post/What_should_be_ideal_KMO_value_for_factor_analysis