A six-station rotary indexing machine performs the machiningoperations shown in the table below, with processing times andbreakdown frequencies for each station. Transfer time is 0.15 min.A study of the system was undertaken, during which time 2000 partswere completed. The study also revealed that when breakdowns occur,the average downtime is 7.0 min. For the study period,
Station | Operation | Process Time | Pi( breakdown) |
1 | Load Part | 0.78 min | 0 |
2 | Drill three holes | 1.25 min | 0.02 |
3 | Ream two holes | 0.90 min | 0.01 |
4 | Tap two holes | 0.85 min | 0.04 |
5 | Mill Flats | 1.32 min | 0.01 |
6 | Unload parts | 0.45 min | 0 |
determine: 1) Average hourly production rate______________. 2)Line uptime efficiency______________. 3) How many hours wererequired to produce the 2000 parts__
