Installation and Upgrade > Windchill ESI > Installing and Configuring Windchill ESI in an SAP Environment > Creating ESI User Accounts and Configuring SAP for Windchill ESI > Configuring BOMs
  
Configuring BOMs
To configure BOMs, perform the following procedure:
1. From the Implementation Guide window, select Production > Basic Data > Bill of Material > Control Data for Bills of Material > Define modification parameters, as shown in the following window:
2. Select Define Modification Parameters. The following window appears:
3. Verify that the following modification parameters are selected:
◦ BOM validity maint.
◦ EC management active
◦ CAD active
and Unit 'piece' is set to PC.