The Enterprise Interface Builder (EIB) is a Workday tool used to import and update data in bulk within the OneWA Workday system without any programming. EIBs are available for agencies to upload mass data and transactions.  These important factors need to be considered when using an EIB: Must use default Excel spreadsheet templates for uploading data, related to a given area, and customized for only columns needed; Use of EIB initiates the same business processes as if manually entering data through the user interface; Upload bulk data using spreadsheet templates populated in Workday Data Format.