141 prepared which provided for the cost of additions or deletions from the original design. This estimate superceded the previously issued current estimate in its entire scope and end use. 5. SPECIAL COST STUDIES. These were prepared as directed by the Deputy Director, Test Division, to supply general information or comparative CHAPTER III, SECTION 3 All cost estimates detailed or segregated the relevant elements as follows: 1. Items of direct labor, direct material, equipment usage, and batch and aggregate plant production were all considered as direct costs and were estimated for each job on the basis of similar work in the Zone of the Interior. 2. In accordance with previous construction experience at the Pacific Proving data for the proper determination of Ground, indirect expenses were esti- design, manpower requirements, or construction schedules. 6. COMPLETION ESTIMATE. A copy of all estimates was supplied to the Jobsite for use and reference in reporting mated as 50 per cent of direct labor and 40 per cent of combined direct material and installed equipment. 3. progress, and for preparing monthly completion estimates where it was found that the latest current cost estimate deviated from the field-estimateto-complete by ten per cent. This information was included in each monthly cost statement of work in progress. Data originated or assembled in Estimat- ing were used in various Contract activities at both Home Office and in the Field, such as Contract Administration, Budget, Accounting, Personnel, neering. Security, Procurement, and Engi- TYPE OF ESTIMATES Preliminary Estimates and Cost Studies Original Cost Estimates Current Cost Estimates Complete Cost Estimates Engineering design was estimated at four per cent of the total estimated construction cost of each project under the Expendable Test Facility Program, and three and one-half per cent on the total estimated construction cost of each project under the Plant and Equipment Program. The following compilation shows the number of estimates and the total related construct- ion costs, which appear greater than the esti- mates approved and incorporated into the Contract. This was due to the fact that each estimate required complete processing through the preliminary and original estimate phases prior to the preparation of approved current estimates. NUMBER VALUE 83 762 1170 119 $8,300,000 $14,500,000 348,500,000 $11,000,000 The total value of the above estimates of $83,300,000 was required for approximately accumulated percentages of physical completion of contract items, were compiled and presented An Estimated Operations Schedule, reflecting the scheduling of engineering, procurement, and construction for each item of authorized construction, was issued and reviewed pe- centage of physical completion were received weekly from the field. The Jobsite determined the weight of each construction feature under a contract item by dividing each feature’s direct labor by the total direct labor of the con- $20,000,000 of approved construction. riodically by the Project Manager,his staff, and the Chief Project Engineer. This provided the means for coordinating the work of the various Departments involved. Immediately following the review and issuance of this schedule, a com- plete Catalog of Scientific Stations was issued which provided a brief description of the construction involved, site locations, User require- ments, and served to coordinate the User’s needs with Jobsite construction. Monthly statistics, showing the estimated in the form of a bar chart; reports of the per- tract item as reflected in the original cost estimate. Estimated percentages of physical com- pletion were determined by visual inspection, and the weighted percentage of completion was determined by multiplying the established weight by the estimated physical completion. The over-all percentage of completion as determined above, was supplied monthly to the Holmes & Narver Contract Administrator and AEC for evaluation of earned Contract fees. Page 3-11