A workflow is a chain of different product lifecycle stages. During the sourcing process a product will pass through these consecutive stages. The workflow tool can be considered as a project management tool.
In the workflow tool each product is visually represented by a « block » and each stage is visually represented by a column. All products can be moved to another stage by dragging and dropping the block to a different column.
To every workflow stage (column) some tasks are assigned and the right people within your team will be notified automatically when a product enters this stage.