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Activity diagram shows the work flow from start point to the end point detailing many decision points. Sequence shows detail flow of specific use case and it also shows interaction between actors, system and system components
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In data flow diagrams, the lines between "boxes" represent data that flows between components of a system. Because these only show the flow of data, they do not give an indication of sequencing.In activity diagrams, those lines are simply transitions between activities and do not represent data flow at all. They more represent the sequencing of activities and decisions. You can tell from these what order things happen in.
The purpose of a data flow diagram is to show you how the data flows through an information system. A sequence diagram shows you information regarding how the processes work together and in what order they operate.
A data flow diagram illustrates how data flows from logical point to point in a system. Examples of nodes in such a diagram are databases, tables, discs, servers, clients, etc.. A control flow diagram illustrates how different programs, applications, services, or endpoints act on and process information to achieve certain ends within the context of a system.
actually dfd is used to define how data flow from one process to another process where as er diagram is used to define relation between different entities.
BFDs provide a complete overview of the whole process in block diagram form. They summarise the major unit operation between process block units. PFDs characterize all the process flows to and from all the equipment required to perform the process within the boundaries set by the BFD
DFD for online shopping refers to a data flow diagram. Such a diagram offers information pertaining to the activity between customers, sellers and visitors to an online store.
Sequence diagram (UML), activity diagram (UML), traditional flow chart (may be more...)
difference between laminar air flow & reverse laminar air flow
An ECG or EKG is a recording of the electrical activity of the heart. An echocardiogram is an ultrasound recording of the heart and its blood flow.
ER diagram is Entity Relationship Diagram which shows relationship between different entities in a process.... Data Flow diagram is a symbolic structure which shows the flow of data how it is used in diff stages in a particular process....