It seems like your sentence is incomplete. However, it appears you may be asking about the process of prediction and validation in a specific context, such as statistics, data analysis, machine learning, or forecasting.
A common completion could be:
"Estimate to predict and check the accuracy of the model."
This would involve creating a predictive model, making estimates based on that model, and subsequently checking how closely those estimates match the actual data. If you provide some more context or specify the area you are interested in, I’d be happy to give a more targeted response!