Software Engineering Stack Exchange
Software Engineering Stack Exchange

Questions tagged [data-flow-diagram]

A data flow diagram (DFD) is a graphical representation of the "flow" of data through an information system, modeling its process aspects. DFDs can also be used for the visualization of data processing (structured design).

19 questions
7
votes
1 answer

data structure/algorithm for conditional next step

I have been trying to find a proper way to represent the above data flow (this is just a small case), and I'm not sure if I found a good way to do it. Our current implementation just evaluate all the previous data like: (if user.isMarried &&…
Tomas Ramirez Sarduy
  • 173
  • 4
4
votes
1 answer

What is a good diagrammatic way to represent async event communication between two systems?

What is a good diagrammatic way to represent asynchronous event communication between two systems (the pub sub model)? I am not looking for tools but more of a representation. Is it a sequence diagram, a swim lane diagram or some other?
Vikash Kodati
  • 51
  • 1
  • 5
3
votes
1 answer

Do data stores appears in Level 1 DFD?

Let’s consider that Context diagram is the diagram that describe the system as a single process and level 0 diagram is the one that decomposes this main process into major process and so on. I am mentioning this because my text books refer to…
John adams
  • 493
  • 1
  • 4
  • 12
3
votes
2 answers

Data flow diagram with login

I am creating a system that allows an admin to login, manage items, customers, reservations and many more. But as I have asked my professor, he told me that before the admin can access the managed items, customers etc., the admin should go through…
RalpawTato
  • 33
  • 1
  • 5
2
votes
1 answer

In a Data Flow Diagram, can 2 entities use the same process (with the same incoming data flow)?

For a school project, I need to make a DFD for an educational game, where both students and teachers need to be able to view the game's leaderboard. Currently in my diagram, "Student" and "Teacher" are seperate external entities, "View leaderboard"…
Ice
  • 43
  • 5
2
votes
0 answers

Avoiding crossing lines in DFD diagrams

I have researched DFDs reasonably extensively, and received some feedback from peers about my first DFD. I have since reworked it to avoid lines crossing by duplicating the 'Pokemon' data store. I have read that it should read left to right. Does…
PlantPot
  • 21
  • 3
2
votes
3 answers

Data Flow Diagrams - Difference between Lines and Arrows

I'm currently working with Visio to create Data Flow Diagrams for a System Analysis and Design class but I'm unsure what the difference between ------ and ------> is. I can connect 2 shapes together with a line (process, entity, data store) but does…
Howdy_McGee
1
vote
1 answer

Data Flow Diagram for patient information system for a hospital

I have an example for a DFD for a patient information system implemented in a certain hospital. The below figure, represents the overview diagram (level 0-diagram, if we consider that the first level is the context diagram then the second level is…
AAAA
  • 145
  • 1
  • 5
1
vote
2 answers

What kind of diagram is this?

I was given an API document that contained this diagram. And I was amazed at how cleanly it presents the flow of data between multiple endpoints by putting the end points in vertical silos. Data event flow moves from top to bottom, going back and…
JamesHoux
  • 254
  • 1
  • 8
1
vote
2 answers

Drawing UML activity diagram for Statistics feature

I need to draw a UML Activity diagram for a school java software engineering project I’m required to do. I’m quite new to this and I’m not sure what should be shown and what should not be shown. For this question, I’m interested to show the activity…
Prashin Jeevaganth
  • 185
  • 4
0
votes
1 answer

What does it mean the fish objects on the architecture diagram?

What does it mean this fish object on the architecture diagram?
J.J. Beam
  • 461
  • 1
  • 4
  • 7
0
votes
1 answer

How to represent a duplicate data store in a data flow diagram (DFD) in the Yourdon DeMarco notation?

I am looking for a way to show duplicate data-stores in data-flow diagrams (DFD). With "duplicate" I mean multiple occurrences of the same symbol to avoid too many crossing flows. In Gane & Sarson's DFD notation, duplicate data-stores are indicated…
Ice
  • 43
  • 5
0
votes
1 answer

Draw Data Flow Graph with Constructor and Functions

I am new to software testing and would like to know whether it's appropriate to draw a data flow graph that flows from initiation of variables to constructor and method. Is there something wrong with this data flow graph? class car { string…
Jim_Mcdonalds
  • 119
  • 3
0
votes
1 answer

Refining DFD of an RPG

I am making a game to help childern learn Urdu (Urdu Boli = Urdu Language) This is the high level context diagram of the game.Considering an RPG can any additions be made to the diagram?
Z ee
  • 21
  • 3
0
votes
3 answers

Diagram to show how one object "becomes" another?

I am working in a purchasing system where we take calls: public class Call { public List CallItems { get; set; } } The calls can be turned into quotes, where call items become quote lines: public class Quote { public…
Sydney Park
  • 19
  • 2
1
2