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Questions tagged [dataflow-diagram]

Data flow diagrams are graphical representations of the flow of information through a system. Use this tag for any questions relating to DFDs, their features and uses, and suitability in different circumstances.

A data flow diagram (DFD) is a graphical representation of the "flow" of data through an information system, modeling its process. A DFD is often used as a first step to create an overview of the system, which can later be elaborated on. They can also be used for the visualization of data processing, as part of a structured design process.

A DFD shows the information that will be input to and output from the system, where the data comes from and goes to, and where the data is to be stored. It does not show information about the timing of the process, or information about whether processes will operate in sequence or in parallel.

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Can you use use read/write on data flow chart?

If I have a front-end application that reads from the API of a backend, then I would have a data flow chart like this, because the data flows from the backend to the frontend: However, when I would like to emphasize that this is a read only API,…
Adam
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Is there a way around data flow diagrams rules?

Can data come out of a data store and then be processed and then go to an external entity? My question is that is it ok that data (coffee and hot water) are coming out of a data store (container) and then are processed into coffee and then poured…
Moaaz Siddiqui
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Is there a library which can generate animated SVG diagrams like this example?

I'm constantly doing some flow diagrams using rather "primitive" tools like draw.io / lucidchart / etc. I accidentally landed on https://thingsboard.io/docs/iot-gateway/what-is-iot-gateway/ while researching a completely different topic and…
tftd
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Difference between standard and non-standard diagrams in Software engineering

I am writing a documentation for my Software engineering subject. My project is on a Hospital Managements System. Here is the question that is making me confused. (2. Architectural design) Present the overall software architecture, stating whether…
Raphael Arpa
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Dataflow diagram designer in Silverlight

I am looking for material for developing a simple dataflow designer in silverlight. For instance, how to define connectors, nodes, dragging nodes, etc. I already found useful information in link but please let me know if you know other useful…
Javier Espinosa
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what are the Data Flow Diagrams DFD?

What are DF Diagrams , and how they help project managers in their job?
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Why am I getting a big spike in audio at the start of each sample in LabView?

Everything else seems to be fine but at the start of each recording (1 second each) there's a big amplitude spike, I'm wondering what is causing it and how to fix it. -I'm using the correct mic (it is recording audio properly) -2 Channel -16 bit…
Curtis
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How should I depict "User wants to see his profile" in a Dataflow Diagram? Maybe I shouldn't?

I have a User that wants to see his online profile, in a site where he previously has registered at. I am in charge of making a Dataflow Diagram out of this situation. I know for sure that the System will return a Profile. That is why I put an arrow…
devoured elysium
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Functional Decomposition Diagrams and Data Flow Diagrams

What is the relationship between an FDD and a DFD of the same system?
codeislife
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Some questions regarding Context and DataFlow Diagrams

I have to develop a CRUD application, that will be coded in php. I have 3 main actors (Users, Administrators and Doctors -- this is for an hypothetical hospital), each one with different Use Cases already defined. Although I feel the Use Cases are…
devoured elysium
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Can't exclude Data Flow Diagram from Enterprise Architect Documentation

I'm trying to generate documentation with activity diagrams in Enterprise Architect 12, but no matter what option I choose it still adds Data Flow Diagrams to report. Even when I mark every diagram type in the DFD is still in the report. I had DFD…
Robert Karwowski
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Live variable analysis , is my explanation correct?

As stackexchange have not more tags about compiler tags , so I'm posting here , this question . A variable x is said to be live at a statement Si in a program if the following three conditions hold simultaneously : 1. There exists a statement Sj…
user4791206
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Could anyone explain this dfd?

I am new to Dfds . I have to make a dfd for my project so for that I am studying about them . I found this dfd on the inetrnet but I am unable to understand it's few parts , such as , why query process has been attached to the resrvation process ,…
user4570754
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What are good ways to design or diagram state?

The issue that prompted me to ask this is a web form that was not persisting data the way I expected it to. That's vague, but the point is, what do you like to do to model state, flow of data, and so forth?
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Creating a Dataflowdiagram for a three-tiered Architecture

I want to create a dataflowdiagram for a three tiered software architecture, finally I want to create a Threat Model with the Dataflow diagram. The software is supposed to be some kind of a gateway. It accepts HTTP Requests via a REST-Interface and…
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