Page 153 - The Toyota Way Fieldbook

130 THE TOYOTA WAY FIELDBOOK

This is a fairly simple job in terms of the operator-machine interface. More
complex jobs may have an operator who moves within a cell and operates three
or four machines. Like the Standardized Work Chart, the Standardized Work
Combination Table converts the work into a visual format so the work/walk/wait
time relationships can clearly be seen (the waiting time on this job should be the
first improvement target!). The waiting time occurs after the operator starts
the robot cycle. This time should be utilized for additional value-adding activity.
Figure 6-7, below, shows the same job with the addition of a secondary task
by adding loading and unloading of a second automatic operation. Notice that
the operation time “wraps around,” meaning the machine operates beyond the
takt time relative to the start time of the operation. The important thing to note
is that the second robot completes its cycle before the operator is ready to return
to reload it (the robots have an automatic unload feature, which is common in

Process Date: Takt Time
Name Standardized Work Manual
Automatic
Part Name Combination Table Walking
Part # Group: 76
Time Elements Operation Time (Seconds)
# Work Elements Manual Auto Walk 10 20 30 40 50 60 70
1 Pick up Bracket A 1 2
2 Load in fixture 6 2
3 Pick up Bracket B 1 3
4 Load in fixture 5 3
5 Pick up Side Support 1 1
6 Load in fixture 3 1
7 Pick up Stiffener 1 2
8 Load in fixture 8 2
9 Pick up Brace 1 3
10 Load in fixture 5 3
11 Start Robot cycle 1 23 1
Pick up battery tray and
12 Bracket 2 2
13 Load Fixture 10 2
14 Start Robot 2 cycle 1 45 2
15
Totals 46 68 29
Figure 6-7. Standardized Work Combination Table with two robots