$($i$)$ For a drill press operation, the following data are known:

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Work Elements $$ Observed time$$ Rating

$($min$./$pc$.)\%$

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$1.$ Load drill press $0\mathrm{.}20115$

$2.$ Drill hole with automatic power feed$0\mathrm{.}25100$

$3.$ Check tolerance of the last piece produced$0\mathrm{.}10110$

during machine cycle $($#$2)$ with go$/$no$-$go gauge

$4.$Unload drill press$0\mathrm{.}15120$

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The company allows: $5\%$ for personal, $5\%$ for unavoidable delays and $5\%$ for fatigue.

Calculate the normal time and the standard time for the operation in min$/$pc$.$

$($ii$)$ Why is it important to maintain time standards properly$/$accurately$,$ especially for the company which follows a wage incentive program? What procedure would you recommend for a sound program for the maintenance of time standards?

$($iii$)$ Show by means of a typical productivity increase graph or learning, the most desirable stage in the production to establish the time standard.