Question

. Specialized processing equipment is required for a new tupe of integrated circuit to be produced by an electronics manufacturing company. the process us used on silicon wafers. The standard time for this process is 10.6 min per wafer. Scrap rate is 15%. A total of 125,000 wafers will be processed each year. The process will be operated 24 hours per day, 365 days per year. Data provided by the manufacturer of the processing equipment indicate that the availability is 93%. Each machine is operated by one worker, and worker efficiency is 100%. No setups are required for the machine. How many pieces of processing equipment will be needed to satisfy production requirements?

Answer 1

Answer:

3.19

Explanation:

Total workload = (125,000 × 10.6) ÷ 60 hrs

                         = 22,083.33 hrs

scrap rate = 15%

So total work load considering the scrap rate:

= 22,083.33 ÷ (1-0.15)

= 25,980.4 hr/year

Available time = 365 × 24 × 0.93

                        = 8,146.8 hr/year

Number of machines needed = 25,980.4 ÷ 8146.8

                                                 = 3.19

Nearly, 4 units when rounded up.