In a helpdesk organization that is operating $24/7,$ the next shift cannot start until the current shift finishes is an example of which precedence diagramming method relationship $?$ a$)$ Finish to Finish $($FF$)$ b$)$ Start to Start $($SS$)$ Start to Finish $($SF$)$ d$)$ None of the choices e$)$ Finish to Start $($FS$)$