# Abstract:
This tool presents the costs to consumers of support to different electricity generation technologies. It is designed to help show the impact of different policy / market arrangements on the required support for different generation technologies. Users can also examine the effect of amending some inputs (although due to the interdependency of the system, sensitivities such as changing variable costs will require a re-run of the underlying dispatch/investment model.

# Context:
Significant investment in new electricity capacity is required over the next decades to meet carbon budgets while maintaining security of supply. Much of this investment could be driven by policy decisions, for example around the allocation of Contracts for Difference (CfDs) to alternative types of low carbon generation. Value for money is a key consideration in these policy decisions. However, there is little consensus around which technologies might provide the best value for money, once their full impacts are taken into account. 
Assessing value for money is a complex and difficult task, and many different approaches and assumptions can be used, ranging from simplified metrics (e.g. levelized costs) to complex ‘blackbox’ modelling.

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