Figure 2-19.Sample of a bill of material (BM) sheet.
Long Lead Items
Equipment production rates are available in the
Long lead items are not readily available through
the normal supply system. They require your special
attention to ensure timely delivery. Items requiring a
long lead time are non-shelf items, such as steam
boilers, special door and window frames, or items
larger than the standard issue. Figure 2-20 shows some
of the long lead items. Identify and order these items
early. Make periodic status checks of the orders to
avoid delays in completing the project.
Equipment estimates are used with production
schedules to determine the construction equipment
requirements and constraints for Seabee deployment.
Of these constraints, the movement of material over
roadways is frequently miscalculated. Factors, such as
road conditions, the number of intersections, the
amount of traffic, the hauling distances, and the speed
limits, are all variables that play into your estimate.
You must consider the types of material hauled, safety
(machine limitations and personnel), operator
experience, condition of the equipment, work hours,
and the local climate are other major factors to
consider in your estimate.
Equipment production must be determined so that
the amount and type of equipment can be selected.
Seabee Planners and Estimators Handbook. The
tables in this handbook provide information about the
type of equipment required. Estimate the production
rate per day for each piece of equipment. You should
consider the factors previously covered, along with
information obtained from NAVFAC P-405 and your
experience. The quantity of work divided by the
production rate per day produces the number of days
required to perform the project. After determining the
number of days of required equipment operation,
consult the project schedule to find the time allotted
to complete the activities. Prepare the schedule for the
total deployment. Use the project schedule to
determine when the work will be performed. The
schedule should also indicate peak usage. It may have
to be revised for more even distribution of equipment
loading, thereby reducing the amount of equipment
required during the deployment.
After the review of the project and material
estimate are complete, prepare a list of equipment
required. This list must include anticipated downtime
and sufficient reserve pieces must be added to cover
To aid you in preparing the equipment estimate
schedule, use such forms as those shown in figures
2-21 and 2-22. The important information on the
forms includes the sheet number, the name of the