“…By ES sourcing, we refer to all organizations' activities throughout the life cycle of obtaining an ES, beginning with the initial adoption decision, to acquisition, implementation, use, maintenance, and evolution and ending with considerations to retire the ES, which might initiate a new life cycle for another ES (Esteves and Bohorquez, 2007). To secure decent business support, decisions are required along the life cycle to balance considerations of evolving business needs, advancing features of ES packages offered, and resource needs associated with the alternatives (Khoo and Robey, 2007).…”