Archive | Flowcharts and Data Flow Diagrams (DFDs) RSS feed for this section

How to make a flowchart?

14 Feb

How to make a flowchart?

Flowcharts are hard enough to explain to a person with physically being in contact with the other person yor are trying to show.

So look at this very good video on how to make a flowchart using microsoft visio

Go with the Flow (Part2)

12 Feb

Hi again,and well done. If your reading this you have survived another week of life so that’s good start. Now the do’s and the don’ts of the flow charts and DFDS..First the don’ts: don’t miss this article and now the do’s: do read this article because it will tell you how to start and make your own flowcharts and DFDs.
Okay so there are four basic symbols you need to know before you start

    1.The  Terminal
    Its the shape of a oval or circle, we use it like we don on board games to indicate start and finish

    2. The Flow Line
    The flow line is the connector cable between all the flow charts objects and tells us the progression of ideas. the symbol shows the logic of the flow in a positive direction

    3.The Process
    It’s the boring shape of a rectangle(and is sometimes called the statement) and tells us that some action is to be taken with the data we know

    4. The Decision
    It’s the shape of a diamond and is the sign that a decision in  has to must be made  e.g. yes or no

    figure1

    Here is an example of a flow-chart  for example when we toast bread in the morning using all the symbols i discussed above
    Toast Flow Chart flow-chart1 (1)

    So there you go you  too can make your own flow chart.( assuming you have nothing else better to do with your life of course).  next week in part 3 I will be telling you how to spot the difference between flow charts and DFDS. And Please comment below

Types of Flowcharts

11 Feb

There are 4 different types of Flowcharts. In this blog, I will describe the different types of blog and show an example of each of them.

System Flowcharts:

This is the most common type of Flowchart. It is used to show the logical flow of the process and includes decisions, flows of control, data stores and documents.

image008
Deployment Flowcharts:

This is sometimes referred to as a “cross functional flowchart” as it shows a process that involves a number of functional areas within an organisation. For example, the tracking of a product from supplier to customer would involve the purchasing department, accounting, the storage of the product and the sales department.

deploy_clr

Top down flowcharts give an overview of the major steps in a process. Each of these steps are then divided into subtasks. The flowchart is drawn horizontally and the subtasks are written below the main step in the process. There is usually less steps in this flowchart as it is normally used to show the most important steps.

Flowchart-top-down

Logic Flowchart:

Logic Flowcharts are mainly used by programmers prior to coding. It is used to show the logical flow of control through the program, the processes and decision branches (If/Then/Else). It documents the order in which tasks are to be performed.

Picture2

The Facts: Flowcharts

5 Feb

A flowchart is a tool for examining processes, programmes and systems. They are commonly used in business or economic presentations to help the audience visualize what the presentation is about. To make a flowchart, there are four steps. You identify the process or system, you highlight the various stages involved in the process/system, you identify any decisions to be made and you construct the flowchart. In the below example, the start of the flowchart is denoted by a terminal, there is then a decision to be made which is denoted by the triangle.

 

 

There are many benefits to using a flowchart. Efficiency increases, technical processes are described to untrained users and presenters can provide large amounts of information

 

Flowcharts are useful but they can be funny too!

Key characteristics of Data Flow Charts

5 Feb
Data Flow Charts are broadly used, easy to grasp and quite straightforward to develop.
They contain two separate parts:
  • a set of Data Flow Diagrams
  • a set of connected  textual descriptions
The main aim of Data Flow Charts are to support users with an applicable tool for understanding the information processes of a system.

The Data Flow Diagrams are diagrams that are made up of four symbols:
  • the external entity
  • the data store
  • the data flow
  • the processes

 

MCU_flow_chart

Flowcharts and Data Flow Diagrams

5 Feb

A flowchart is a tool for analyzing procceses, programs and systems.

A flowchart depicts the flow of operation through a program or process.

Flowcharts are made up of a set of standard symbols including decisions(triangle), process(square), start/end terminal (running track oval), and connector and comment symbols(arrows) etc.

Flowcharts must always start with a start/end terminal symbol and should also finish with the symbol.

There are also different types of flowcharts such as:
Systems flowcharts
Deployment flowcharts
Top-Down flowchart
Logic flowcharts

This is an example of a basic flowchart

flowchart

Flowcharts and Data Flow Diagrams (DFD’s) explained

4 Feb

Hi all, in my first post I will explain Flowcharts and Data Flow Diagrams at a basic level. Flowcharts help businesses assess their data. A Flowchart can also display a step by step analysis of a business model. This in turn helps show valuable information to employees, managers and shareholders in the business in a simpler way. Flowcharts are used in presentations. There are many shapes/actions in each Flowchart. There are many different types of Flow Charts. The contents of each flowchart depends on its purpose e.g a business flowchart will show how the business is performing.

This is an example of a flowchart of a Small Business start-up

business_flowcharthttp://www.t-tap.org/training/onlineseminars/griffin/griffin.htm

This is an example of a Flowchart with making a friend. This is an easier graph to understand and shows the way the decisions in the flowchart affects the final outcome.

makefriendflowcharthttp://www.flowcharttools.com/makefriendflowchartexample.html

 

I hope that made it easier for everyone to understand Flowcharts at a more basic level, now I will talk about Data Flow Diagrams.Data Flow Diagrams shows the flow of Data internally and externally. DFD’s are mostly used in the computer industry’s. DFD’s are a graphical way of showing how a business is run.

Below is a simple version of a Data Flow Diagram

dataflow-diagram

Data flow charts are similar to flowcharts but have a few key differences which I will discuss the next week.

 

 

 

Go with the Flow (Part1)

4 Feb

Hi there, this is my idiot’s introduction to flow charts and data flow diagrams (DFD).  Flow charts and DFDs are both basically pictures displaying information. There are normally used to show a process of sequenced information they can be very useful for businesses. For example if a company had a business plan they wanted to implement flow charts and DFD give the company:

  • A preview on how  roughly the business plan would look step by step
  • This then can give better clarity quicker on understanding the business plan then  simply reading it in a long text form
  • And you can keep adding to flow charts and DFDs, meaning if the company are unhappy with how the business plan works they can keep changing it incrementally until its reaches their satisfaction

Here is a small example of flow chart we students commonly use for  decision making  on wheter to get up in the morining

Process-Flowchart

http://4.bp.blogspot.com/_mDaf3IQ-j-4/SvIgvdLyWlI/AAAAAAAACNA/S0PzszcWqdc/s640/Process-Flowchart.png

 

Next week I will tell you the dos and the don’ts of flow cahrts and DFDs so stay tuned. (By the was if you have any comments or queries just them them in below and I’d be happy to respond)

Differences Between Data Flow Diagrams & Flowcharts

4 Feb

Both Data Flow Diagrams (DFD) and Flowcharts are used in describing, step by step, the path of a process or data. Both diagrams are used to make it easier to understand the way a process is taking place or data is being processed.

Flowcharts:

Flowcharts are used to break down a complex process into simple steps (denoted by different boxes) that are connected by arrows. It starts at the beginning of the process and follows each step through the process until the end. Flowcharts can also show how to deal with problems that may occur during the process.

Simple Flowchart:

dm11FlowChart

Data Flow Diagrams:

A DFD shows how data flows through a system which is processed as well. The flow of the data from an external or internal source as well as where the data will end up is shown in a DFD.

Simple Data Flow Diagram:

Lectur4

Flowchart vs Data Flow Diagrams:

The slide below outlines the main differences between Flowcharts and DFDs:

slide-1-728

Sources:

http://www.slideshare.net/umarali1981/difference-between-flowchart-and-data-flow-diagram

http://www.differencebetween.com/difference-between-flowchart-and-vs-data-flow-diagram-dfd/

Flowcharts and Data Flow Diagrams (DFD) – An Introduction

30 Jan

A flowchart is a type of diagram that represents a process. These diagrams are step-by-step processes  which result in giving a solution to a problem. They always begin and end with an oval shaped symbol called a terminal. Then there’s a flow line which denoted the direction of the logic flow in the decision making process. Then there are parallelogram shaped symbols which show either an input or an output of the process. The rectangular shaped symbol denotes a process which is to be carried out and the diamond shape symbol denotes a decision to be made.

     This is an example of a very simple flowchart.

 

A Data Flow Diagrams (DFD) is a graphical way of representing the way in which data flows through an information system. The structured design can be used for the visualization of processing data. It shows the type of information that is used in a system through inputs and outputs, where the data comes from and goes to and where the data will be stored. Below is an example of a very simple DFD.

Data Flow Model Diagram

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