Question

6. Pieces produced per cycle: 8
   
   Average measured cycle time: 8.36 min
   Average measured effort time per cycle: 4.62 min Average rapid traverse time: 0.08 min
   Average cutting time power feed: 3.66 min Performance rating: 115 percent
   Allowance (machine time): 10 percent Allowance (effort time): 15 percent

The operator works on the job a full 8-h day and produces 380 pieces. How many stan-

dard hours does the operator earn? What is the operator’s efficiency for the 8-h day?

Answer 1

1. Pieces produced per cycle: 8

Average measured cycle time: 8.36 min
Average measured effort time per cycle: 4.62 min

Average rapid traverse time: 0.08 min
Average cutting time power feed: 3.66 min

Performance rating: 115 percent
Allowance (machine time): 10 percent

Allowance (effort time): 15 percent

The operator works on the job a full 8-h day and produces 380 pieces.

Solution is as follows:

Standard power feed cycle time=(cutting time + rapid traverse time)*1*1.10 (allowance)

= (3.66+0.08)*1*1.10

=4.114 minutes

Standard manual cycle time=(average cycle time-(cutting time + rapid traverse time))*1.15*1.15 (allowance)

=(8.36-3.74) *1.15*1.15

=6.110 minutes

Standard time=standard power feed cycle time + standard manual cycle time

=4.114 minutes+6.110 minutes

=10.224 minutes

Standard piece time=Standard time/ pieces produced per cycle

=10.224 minutes/8 pieces

=1.278 minutes

How many standard hours does the operator earn?

Standard hour earned=standard piece time x pieces produced/60 minutes

=1.278 x 380/60

=8.094

What is the operator’s efficiency for the 8-day?

Efficiency=standard hour earned/ number of days

=8.094/8