According to the BABOK® v3 guide, the purpose of data flow diagrams is to "show where data comes from, which activities process the data, and if the output results are stored or utilized by another activity or external entity."
According to the BABOK® v3 guide, the purpose of data flow diagrams is to "show where data comes from, which activities process the data, and if the output results are stored or utilized by another activity or external entity."