Loan Application Process Flow

All arriving input loan application forms $($hereafter "forms"$)$ to a process undergo a task T$1(3$ minutes$)$ performed by Staff $A.$ The forms after the task T$1$ is separated into two parts la$,$ lb$.$ Staff B performs T$2(2$ minutes$)$ on la and Staff C performs task T$3(4$ minutes$)$ on lb$.$ After T$2$ and $T3,$ la and $Ib$ are joined and goes through task T$4$ which can be performed either by Staf D or Staff E$.$ Staff D takes $5$ minutes while Staff E takes $4$ minutes to perform task T$4.$ After T$4,$ the input is again re$-$separated into la and Ib$.$ Staff F performs T$5(2$ minutes$)$ on la and Staff G performs task T$6(5$ minutes$)$ on Ib$.$ After T$5$ and T$6,$ la and Ib are joined and the combined form leaves the process.