committed to start on 1 May. Step 8 would be plotted second, followed by
steps 9, 10, 14, 11, 1 and 2. In this example, steps 11, 1, and 2 are plotted
right to left, because the right-hand time has been determined from the
critical steps. Note that the start of steps 1 and 2 will be earlier than 1
May and that step 1, procurement of Navy stock material, should be by 25
April; and step 2, procurement of Navy stock material, should be initiated by
20 April. The appropriate duration time and the labor hours required for each
step for each week should be shown in the Scheduled Hours Table on the Job
Schedule Bar Chart. In like manner, the noncritical steps are placed on the
chart; however, "float" will allow some freedom of choice in scheduling these
steps in accordance with shop practice. The starting and finishing dates for
each step may then be read from the completed chart.
(2) Job Schedule. A job schedule (see Figure A-9) is prepared from
the Job Schedule Bar Chart. The Job Schedule should be prepared on a
realistic basis. For example, the Job Schedule Bar Chart indicates that step
11, install light fixtures, has a duration time of 6.5 hours (39 manhours)
during the third week. More specifically, it shows that this step would
require 3.6 hours for each of the 6 member crew. As step 11 can be completed
in a duration time of 6.5 hours, it is more economical to schedule this step
to start on 17 May instead of 16 May. Transportation for the six-member crew
would be required twice rather than four times, and the painters would be
further along with their work, causing less potential interference.
Similarly, step 14, clean up, could be scheduled for 18 May instead of a part
of 17 and 18 May. However, job conditions could be such that satisfactory
productive results could be obtained by working the clean-up crew on both
days. Notes should be made on the Job Schedule Bar Chart to indicate such
changes. A copy of the Job Schedule Bar Chart should be distributed with each
copy of the Job Schedule.
(3) Shop Scheduling. Normal shop scheduling procedures will then be
followed, and a thoroughly alerted group of supervisors will be better able to
supervise and assist the work to its scheduled completion.