bill of materials , SAP, Javascript, Oracle, Apis, Api Development, Change Management, SQL Server, Jsp, Spring, Mvc, Windchill PLM data model, ESI Webservice, Windchill customization, object-oriented methodologies, ESI integration, Workflow Process, Windchill Product Analytics, Oracle Apps Integration, Release to Manufacturing, Windchill, Part Classification, PLM concepts, CAD Assembly, Web-based development, Product Structure Process Management