“…Caregivers start and finish their activities at their own homes (i.e., multi-depots) ( Bard et al, 2014 , Fathollahi-Fard et al, 2020 , Trautsamwieser et al, 2011 ). Each task is necessarily performed for a certain duration, which can be requested using either a fixed constant ( Cappanera et al, 2018 , Gomes and Ramos, 2019 , Liu et al, 2017 , Maya Duque et al, 2015 ) or a flexible range ( Mosquera et al, 2019 ). Yuan et al, 2018 , Shi et al, 2018 assume that the service duration is a random variable with known probability distributions, while Shi et al (2019) describe an uncertainty set for the service duration.…”