“…The most frequently measured variables were vibration (Surico et al, 2020;Aqueveque et al, 2021;Magadán et al, 2020) and temperature (Ciancio et al, 2020;Iqbal et al, 2019;Short & Twiddle, 2019), followed by electric current (Ge et al, 2019;Strauß et al, 2018;Barksdale et al, 2018). The most analyzed components were motors, induction or otherwise (Rubio et al, 2018;Eiskop et al, 2017;Talmoudi et al, 2019), followed by bearings (Richter et al, 2019;Bernal et al, 2018).…”