LH$-$RH Chart:

$(2)$ Consider assembling bolts with washers and nuts as given in the following

layout diagram.

Flat

Washers

Bolts Finished

Assemblies

Lock

Washers

Nuts

$($a$)$ Draw LH$-$RH chart of the assembly process using the given bench

layout.

$($b$)$ Draw LH$-$RH chart with an improved bench layout.