Figure 1-10.Layout drawing for a 400-kilowatt electrical power plant.
Network analysis has many advantages. As a
management tool, it readily separates planning from
scheduling of time. The diagram, a picture
representation of the project, enables you to see the
interdependencies between events and the overall
project to prevent unrealistic or superficial planning.
Resource and time restraints are easily adjustable to
permit changes in the plan before its evaluation.
Because the system splits the project into indi-
vidual events, estimates and lead times are more accur-
ate. Deviations from the schedule are quickly noticed.
Manpower, material, and equipment resources can be
easily identified. Since the network remains constant
throughout its duration, it is also a statement of logic
and policy. Modifications of the policy are allowed,
and the impact on events is assessed quickly.
Identification of the critical path is useful if the
completion date has to be advanced. Attention can then
be concentrated toward speeding up those relatively
few critical events. The network allows you to
accurately analyze critical events and provide the basis
for the preparation of charts. This results in better
control of the entire project.
The only disadvantage of network analysis as a
planning tool is that. when attempted manually, it is a
tedious and an exacting task. Depending upon just
what the project manager wants as output, the number
of activities that can be handled without a computer
varies, but the number is never high. If calculations are
in terms of the sequence of activities only, a project
involving several hundred activities may be attempted
manually. However, the chance for error is high. The
time required for manual operation would become
costly. Various alternative plans also may be
impossible because of the large volume of work.
On the other hand, a standard computer program
for network analysis, CBCM 2.1, can handle project
plans and management and give the user the flexibility
to select different alternatives from a list of available
The project manager, NOT the computer, is still
responsible for planning and must make decisions
based on information supplied by the computer. Com-
puter output is only as accurate as its input, which is
supplied by people.
Timekeeping and labor reporting are of great
importance to the operation of Seabee units. While
these are functions of both NCF units and public works
activities, the discussion in this chapter is limited to
NCF units. As a Seabee crew leader, you may be
involved in the preparation of daily time cards.
Therefore, you should know the types of information