In order to use forecasting to evaluate a new market entry, you need to define the scope and objectives of your forecast, gather and analyze relevant data, build and test your forecast model, apply scenarios and sensitivity analysis, and interpret and present your forecast results. When defining the scope and objectives of your forecast, consider the key variables and metrics that you want to estimate. When gathering and analyzing data, think about the sources and quality of the data that you can use to support your forecast, as well as how you can validate and adjust the data to fit your context and assumptions. As for building and testing your forecast model, consider the methods and tools that you will use to create your forecast, how you will structure and organize your model, and how you will check and verify it for errors and consistency. Additionally, when applying scenarios and sensitivity analysis, consider the best-case, worst-case, and most likely scenarios that you want to consider as well as how varying key inputs and assumptions will affect the output. Finally, when interpreting and presenting your forecast results, think about the main findings and insights that you can derive from your forecast as well as how you will compare different scenarios and outcomes.