CHAPTERIli, SECTION 3
Preliminary Cost Estimates were used as
a basis for Construction Budget Submittals,
Long Range Reports, and Special Reports and
Studies. They were also used for scientific and
other types of construction where a general indication of cost was desired.
Original Cost Estimates were submitted
with requests to AEC for approval of drawings,
together with requests for approval to proceed
with construction. They were also used as a
basis for “Preliminary Proposals” for PAC work
which was estimated to cost $20,000 or more.
Current Cost Estimates were based on final
approved drawings. When these estimates were
approved by the AEC, they became the official
estimates which were used for computing fee,
determining construction progress, and for controlling cost. All of these types of estimates
were revised when the scope of work, as defined by the drawings, was changed.
a.
Under $10,000, at 100%
completion.
b.
From $10,000 to $50,000, at 50%
and 100% completion stages.
c.
Over $50,000, at two-week intervals and 100% completion.
In addition,
“Special Report Cost Esti-
mates” were prepared to reflect the total estimated cost involved for the preparation of
special studies and reports as requested by AEC,
and “Cost Studies” were prepared to reflect
differences in cost for various designs of construction. The latter were prepared primarily to
assist Design Engineers and others in the selection of construction methods and designs.
The Home Office Estimating Group collected construction progress data from Jobsite,
applied weighted values to each item of construction, and computed progress for various PAC
pre-
projects and expendable construction. These
Management to undertake corrective measures,
and “S” curves and were distributed to AEC
and H&N management for over-all job evalu-
Working
Estimates
and
Analyses,
pared by the Jobsite Estimating Group, provided
a means of job labor control which enabled
when necessary. They also acted as an aid to
future cost estimating, the establishment of
current measurements of actual performance,
and the provision of data for use in preparing
reports.
Working Estimates and Analyses were pre-
pared at intervals as follows:
1.
2.
Plant
Work.
Acquisition
and
Construction
a.
Under $10,000, at 100%
completion.
b.
Over $10,000, at 33%, 66%, and
100% completion stages.
Expendable and Reimbursable Work.
progress reports were in the form of bar charts
ation.
The following table reflects the number of
estimates, by type, and their approximate total
values:
TYPE OF
ESTIMATE OR
WORK ORDER
NUMBER
APPROXIMATE
VALUE
Preliminary
210
$ 38,000,000
Original
915
21,000,000
Current
1,270
54,000,000
419
65,000,000
Working Estimate
and Analysis
Special Reports
29
400,000
Page 341