The data sources and methods for estimating the costs, benefits and disbenefits for the nuclear power plant.

Best down unit cost estimation:
The top-down approach depends on a straightforward computation; isolate add up to consumption (quantum of financing accessible) for a given territory or arrangement by aggregate units of movement to determine a unit cost. The units of movement are particular to the administrations that are being cost. Normally this approach utilized total, budgetary information to appraise a unit cost. The upsides of the top-down approach are:
Accessibility of information: The accessibility of budgetary information implies that top-down methodologies can be connected effectively.
Base up unit cost estimation:
The base up approach gives a more prominent level of granularity than the top-down technique. It includes recognizing the majority of the assets that are utilized to give an administration and appointing an esteem to each of those assets. These qualities are summed and connected to a unit of action to infer an aggregate unit cost - this gives a premise to appraisal of which expenses can be kept away from as a consequence of diminished request.
The upsides of utilizing a base up approach are:
Straightforwardness: Point by point cost information permits potential blunders to be explored and their effect tried - this encourages the quality confirmation handle.
Granularity: Point by point cost information can highlight varieties in cost information, and empower specialists to investigate the drivers of variety and figure out if, for instance, some administration clients represent an unbalanced share of expenses.
Adaptability: The technique empowers a specialist to conjecture how expenses may change as an aftereffect of diminishment in administration utilization or request.