and materials. In order to serve these purposes, careful consideration must be given to the
following:
Cost-element comparisons Prepared at each milestone to compare the current
estimate to the previous milestone estimate and to the overall budget and to the
baseline estimate to ascertain whether design or scope changes have been made
or need to be made. Refer to the estimate tracking sheets in Appendix B.
Earned-value accounting Used in conjunction with cost-element comparisons,
the earned-value process allocates cost as it is committed, or as a part of the project
is completed. Decisions regarding contingency and escalation are important in this
process. For additional information, see the Whole Building Design Guide web site
at www.wbdg.org.
Life-cycle cost analysis Used to evaluate the implications of decisions made
during the design process not only on initial cost but also on life-cycle costs. Issues
considered typically include energy utilization, sustainability, maintenance, and
operations. See Chapter 2, Section 2.2 for details.
Shell and core, security upgrades, and tenant improvement (fitout) GSA
requires subdividing the estimate into costs for the shell and core and tenant
improvements, including the associated professional services costs included in the
occupancy agreement between tenants and GSA. Both the A-E's estimator and the
independent government estimator must submit their cost proposals for professional
services to GSA using Forms 2630 and 2631. See Appendix E for sample forms.
Phasing/scheduling packages Used for project work divided into more than one
construction phase. Separate cost estimates, accompanied by an overall project
ECCA summary, support each phase. For phased new construction, a construction
management (CM) firm hired by GSA must prepare a post-award construction
cost analysis for each phase. After contract award of the last construction phase,
a combined post-award construction analysis for the composite project bid is
prepared.
Multistructure projects Projects involving more than one structure require
separate estimates for each structure. Separate site construction-cost estimates
must be associated with the estimates for each structure involved. A CM firm hired
by GSA must prepare a construction-cost analyses for each structure and site
development after the multistructure project is awarded.
Bid alternates and options A CM firm hired by GSA must prepare separate cost
estimates for the base bid and for each individual alternate or option when the
project requires them.
project estimating requirements P-120
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section 1.4
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