The Probable Fieldwork Days Model (PFDM) will be demonstrated. PFDM uses USDA Days Suitable for Fieldwork data to estimate the probability of completing specified fieldwork within a specified period of time. The users selects their state and crop reporting district, enters equipment operating parameters such as implement width and field speed, acres worked and the desired beginning and ending dates. The model presents the results in a tabular and graphical format that allows the user to analyze their management options. PFDM contains fieldwork days data for most of the midwest states.