Toyota Way Fieldbook : A Practical Guide for Implementing Toyota's 4Ps

130 THETOYOTAWAYFIELDBOOK

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

Figure 6-7. Standardized Work Combination Table with two robots

Date:

Group:

Manual Auto Walk

12

22

33

43

51

61

72

82

93

10

11 23

12

13 2

14 45

15

1 6 1 5 1 3 1 8 1

53

1

2

1

2

10

12

Totals 46 68 29

Load Fixture

Start Robot 2 cycle

Pick up Brace

Load in fixture

Start Robot cycle

Pick up battery tray and

Bracket

Pick up Side Support

Load in fixture

Pick up Stiffener

Load in fixture

Pick up Bracket A

Load in fixture

Pick up Bracket B

Load in fixture

Operation Time (Seconds)

10 20 30 40 50 60 70

Standardized Work

Combination Table

Takt Time

76

Time Elements

Process

Name

Part Name

Part #

# Work Elements

Manual

Automatic

Walking