In order to perform sensitivity analysis, you must first define the objective and scope of your analysis. This includes specifying the financial metric or indicator to measure, as well as the input parameters that affect it and how to quantify them. Additionally, you need to build a base case model that reflects your current or expected situation. This can be done through a spreadsheet, software, or simulation tool that calculates the financial metric based on the input parameters. Afterwards, you must vary one or more of the parameters and observe the impact on the output. You can do this by changing them by a percentage, range, or discrete value; and you can use different types of sensitivity analysis such as one-way, two-way, or multi-way depending on how many parameters you want to change at once. Finally, analyze and interpret the results to determine how sensitive your output is to changes in input parameters, which parameters have the most influence on your output, and what implications and recommendations this has for your program management.