Sample Problem $3$

The repetitive work cycle in a worker$-$machine system consists of the work elements and associated times given in the table below. As the table shows, all of the operator's elements are external to the machine time.

a$.$ Construct a worker$-$machine activity chart for this work cycle. $(10$ pts $.)$

b$.$ Determine the idle time and percentage of idle time for the worker and for the machine. $(4$ pts$.)$

c$.$ Propose two improvements to reduce the cycle time. $(2$ pts $.)$

$\backslash$table$[[$Seq$.,,$Work Element Description,Time in Minutes$],[1,$Worker walks to tote pan containing raw stock,$0\mathrm{.}10,$min$],[2,$Worker picks up raw work part and transports it to machine,$0\mathrm{.}18,$min$],[3,$Worker loads part into machine and engages machine semi$-$automatic cycle,$0\mathrm{.}22,$min$],[4,$Machine semi$-$automatic cycle,$1\mathrm{.}10,$min$],[5,$Worker unloads finished part from machine,$0\mathrm{.}05,$min$],[6,$Worker transports finished part and deposits into tote pan,$0\mathrm{.}15,$min$]]$