Detailed information on the actual cost of efficiency-enhancing improvements is not readily available, as concerns over confidentiality and competitiveness with regard to actual projects has largely prevented the sharing of such information. The studies referenced in this report largely show relative information on cost (i.e., high, medium, low), estimate the cost effectiveness of improvements, or mention general cost levels. The case studies have reported costs of efficiency improvements and actual increases in efficiency for specific power plant. But these are considered as useful for estimating a range of costs for improvements rather than actual guides for costs, since each power plant has its own design characteristics and maintenance history. Actual cost information would require a technical evaluation, and a cost vs. benefit analysis to
obtain reliable cost estimates for the options under consideration, taking into account site-specific conditions.