A high$-$production operation was studied during an $80-$hr period. During that time, a total of seven

equipment breakdowns occurred for a total lost production time of $3\mathrm{.}8$ hr$,$ and the operation

produced $38$ defective products. No setups were performed during the period. The operation cycle

consists of a processing time of $2\mathrm{.}14$ min, a part handling time of $0\mathrm{.}65$ min, and a tool change is

required every $25$ parts, which takes $1\mathrm{.}50$ min.