Problem $6-15$

An assembly line is to operate eight hours per day with a desired output of $240$ units per day. The following table contains information on this product's task times and precedence relationships:

$\backslash$table$[[$TASK$,\backslash$table$[[$TASK TIME$],[($SECONDS$)]],\backslash$table$[[$IMMEDIATE$],[$PREDECESSOR$]]],[$A$,60,-],[$B$,80,$A$],[$C$,20,$A$],[$D$,50,$A$],[$E$,90,$B$,$ C$],[$F$,30,$C$,$ D$],[$G$,30,$E$,$ F$],[$H$,60,$G$]]$

b$.$ What is the required workstation cycle time to meet the desired output rate?

Workstation cycle time $|$seconds per unit

c$.$ Balance this line using the longest task time. $($Leave no cells blank $-$ be certain to enter $"0"$ wherever required.$)$

$\backslash$table$[[$Work Station,Task,$\backslash$table$[[$Idle Time$],[($in seconds$)]]],[$I$,($Click to select$)vv,],[$II$,($Click to select$),],[$III$,\backslash$table$[[($Click to select$)vv$