A planning tool for improving the accuracy of forecasting vaccine wastage rates based on service delivery settings. • Estimates, with greater precision, vaccine supply requirements and to improve the planning and management of immunization programmes. • Automatically calculates the estimated wastage rates for all WHO prequalified vaccines (including Rotavirus, PCV, HPV and TCV), increasing the accuracy and quality of wastage data at country level. • Computes the total wastage rate, which includes the unavoidable open vial wastage rate, the closed vial wastage rate per storage facility and the avoidable opened vial wastage rate.