Detailed Feasibility Study Phase

The feedback and direction provided by host facility management after review of the initial study work will help guide the study team in refining the overall project scope and limiting the focus to those measures that the facility wishes to include in the final investment-grade study or proposal. The Detailed Feasibility Study is initiated following acceptance of the Preliminary Feasibility Study and authorization to proceed with this final development phase effort.

In the case of a standard plan and specification type approach to project implementation, the Detailed Feasibility Study would typically be performed by an engineering firm under contract with the host facility. It would serve first as a basis of making internal funding commitments and then as a basis of commissioning a design-engineering firm (sometimes the same firm) to develop the design and construction bid documents. In the case of many types of energy services arrangements, the Detailed Feasibility Study results in a firm proposal from an ESCo to perform a turnkey design-build project. Hence, the study must be highly detailed to allow the host facility to make a major investment commitment and to ensure that the ESCo has mitigated its own risk and can stand behind its guarantees of price and savings. Either way, the Detailed Feasibility Study should produce an investmentgrade final report.

An update to the Project Development Plan is made at this stage. The Plan should now reflect the final package of measures and the associated work effort required to prepare detailed analysis of costs and savings.

Having more clearly defined the overall project scope and limited the focus to opportunities that have a realistic chance of being implemented, the detailed study phase proceeds with more rigorous on-site investigation, inclusive of direct system metering, and more in-depth, precise analysis. This is followed by the development of a preliminary design, a detailed scope of work (SOW), and firm construction pricing, along with finalized energy baselines and, where applicable, final OM&R and M&V Plans.

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