The document discusses sourcing strategies and the sourcing process. It describes tactical sourcing as relating to lower level procurement decisions on routine items, while strategic sourcing involves top level decisions on high value items critical to business strategy. The sourcing process involves identifying, selecting and developing suppliers. Sourcing strategies are determined using the Kraljic matrix which categorizes items based on financial and supply risk. Sole sourcing and single sourcing are discussed as strategies, with sole sourcing occurring when only one supplier exists and single sourcing selecting one supplier from multiple options.