Illustrative figure of how the G316.75 stellar cluster mass might evolve in time. Time t = 0 Myr is now. The solid red, blue and black lines shows the time evolution of the cluster mass in the active region, the cluster mass in thequiescent region and the combined cluster mass respectively. Grey shaded region labeled as “supernova” indicates when a supernova explosion is expected. Labeled markers indicate current and predicted cluster masses as discussed in Sect. 7.1.