Consider a simple job shop manufacturing system that makes three class A products requiring three types of machines. The three products include seven parts shown in Table 2.1. Table 2.1 also shows the time standards in units per hour. Assuming an hour has only 55 minutes of productive time (5 minutes is lost due to operator or machine unavailability and machine downtime), 12,000 units of each part are to be made per day, and the job shop operates only one 8-hour shift per day, determine the number of units of machine types A, B, and C that would be required to achieve the desired production rate.
TABLE 2.1 Time Standards for Seven Parts in Units per Hour Part Machine 1 2 3 4 5 6 7 A 2000 1200 1500 2300 2000 1200 1000 B 1200 1800 1200 1600 ? 1200 2000 1200 1400