$1$ Assembly Line Balancing

Question $(1)$ The work elements, precedence requirements, and time requirements to assemble a Picture frame are shown here.

Construct a precedence diagram of the process and label task times.

Set up an assembly line capable of producing $1\mathrm{.}600$ frames per $40-$hour week.

Calculate the efficiency and idle time of the line.

$\backslash$table$[[$Element$,$Description,Precedence,Time $($minutes$)],[$A$,$Attach left frame side to top of frame.,$-,0\mathrm{.}35],[$B$,$Attach right frame side to bottom of frame.,$-,0\mathrm{.}35],[$C$,$Attach left and right frame subassemblies.,A$.$ B$,0\mathrm{.}70],[$D$,$Cut $8-$inch x $10-$inch glass.,$-,0\mathrm{.}50],[$E$,$Cut $8-$inch x $10-$inch cardboard.,$-,0\mathrm{.}50],[$F$,$Place glass into frame.,C$.$ D$,0\mathrm{.}20],[$G$,$Place cardboard into frame.,C$.$ E$,$ F$,0\mathrm{.}20],[$H$,$Secure cardboard and glass.,F$,$ G$,0\mathrm{.}50],[$I$,$Apply descriptive label to glass.,D$,0\mathrm{.}10]]$