"A process flow diagram (PFD) is a diagram commonly used in chemical and process engineering to indicate the general flow of plant processes and equipment. The PFD displays the relationship between major equipment of a plant facility and does not show minor details such as piping details and designations. Another commonly used term for a PFD is a flowsheet. ... 
Process flow diagrams of multiple process units within a large industrial plant will usually contain less detail and may be called block flow diagrams or schematic flow diagrams." [Process flow diagram. Wikipedia]
The process flow diagram (PFD) template for the ConceptDraw PRO diagramming and vector drawing software is included in the Chemical and Process Engineering solution from the Engineering area of ConceptDraw Solution Park.
                        
                                                
                    Process flow diagrams of multiple process units within a large industrial plant will usually contain less detail and may be called block flow diagrams or schematic flow diagrams." [Process flow diagram. Wikipedia]
The process flow diagram (PFD) template for the ConceptDraw PRO diagramming and vector drawing software is included in the Chemical and Process Engineering solution from the Engineering area of ConceptDraw Solution Park.
Data Flow Diagrams (DFD) visualize data flows in information systems. 
They show: what kinds of data input to and output from the system; where the data come from and go to; where the data is stored.
DFDs are used for design and analysis of business and engineering information systems.
They are also used for data processing visualization.
                        
                                                
                    They show: what kinds of data input to and output from the system; where the data come from and go to; where the data is stored.
DFDs are used for design and analysis of business and engineering information systems.
They are also used for data processing visualization.
HelpDesk
                                                How to Draw a Process Flow Diagram in ConceptDraw PRO
Process Flow diagrams are used in chemical and process engineering to show the flow of chemicals and the equipment involved in the process. When it comes to creating a process flow diagram, it's important to use software that is capable of describing a wide range of processes, using techniques and graphical notation that are easily recognized by engineering workers. An ideal drawing platform will utilize functions that can cope with the output of a high volume of engineering processes, that may change rapidly from development to implementation stages. ConceptDraw PRO, with the extended functionality of the Chemical and Process Engineering Diagrams solution, is the ideal medium for creating designs of this type. The Chemical and Process Engineering Diagrams solution complements this feature with a library of selected icons to represent various steps — all instantly recognizable and applicable to a wide user base. ConceptDraw PRO allows you to draw the Process Flow diagram easily using the set of special libraries.- Data  flow Model Diagram 
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