1.9 In a simultaneous batch processing operation, batches of parts are subjected to a heat treatment process that takes 37.0 min. The batch size each cycle = 120 parts. Each starting piece has a material cost of $1.68. It takes 15 min to load the parts into the furnace and 12 min to unload them onto a moving conveyor. A 2-min changeover time is allowed between batches. The furnace is maintained at the desired temperature for successive batches. Its cost rate = $54/hr. Determine the (a) cycle time, (b) average processing rate per part, and (c) part cost at the completion of the heat treatment process.

1.10 Using the data from the previous problem, determine the (a) cycle time, (b) average processing rate per part, and (c) part cost at the completion of the heat treatment process, if there is a 5% scrap rate during the heat treatment.

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