Advantages Of Data Flow Diagram In Threat Modeling Process Activity Diagrams – Advantages, Disadvantages and Applications of Use

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Activity Diagrams – Advantages, Disadvantages and Applications of Use

Activity diagrams describe the actual work flow behavior of an information technology system. These diagrams are similar to state diagrams because an activity is the actual state of doing something. These diagrams describe the actual state of system activity by showing the sequence of all actions. Also, these diagrams can show conditional or parallel actions.

When to use: Activity diagrams

Activity diagrams should be used in conjunction with other modeling techniques such as interaction diagrams and state diagrams. The main reason behind using these diagrams is to model the workflow behind the designed system. These diagrams are also useful for analyzing use cases by which actions need to be performed and when they should occur, describing complex sequential algorithms, and modeling applications with parallel processes.

Advantages of Activity Diagram:

  • The UML modeling language incorporates these diagrams so that they are generally easy to understand by both analysts and stakeholders.
  • In UML for IT Business Analysts, “Activity diagrams are most useful for IT BAs to depict work flow. [because] It’s easy to understand – for BAs and end users.”
  • Since they are among the most user-friendly diagrams available, they are generally considered an essential tool in the analyst’s repertoire.
  • In addition, as stated above, activity diagrams allow the analyst to display multiple scenarios and actors in a work flow through the use of Swimlens. Swimlens, however, are optional as single positions or actors are usually displayed without them.

Disadvantages of Activity Diagram:

The UML modeling language recognizes that these diagrams have the potential to become overly complex because their user-friendly nature lends itself to comprehensive description. In other words, since project-related information is so easy to display, why not include it all? When an analyst has a large project, it can be tempting to create a single, overly complex diagram.

However, as one author points out, “If you use activity diagrams to define the structure of a workflow, you should not try to explore the many layers of activity graphs down to their most ‘atomic’ level”. Instead, the analyst should try to introduce a new figure for each work flow, or if more applicable, to use swimlens to present different actors in the same work flow.

Another aspect of these diagrams is that they cannot be used in place of state diagrams or sequence diagrams because “activity diagrams do not provide details about how objects behave or how objects cooperate.” This is not a disadvantage in itself, but it is important for the analyst to keep in mind when applying the diagram to their work.

Finally, activity diagrams are easy to get hold of and will be useful for most projects because they clearly and concisely show how things work.” Like many diagramming techniques, these diagrams also enable the depiction of multiple choices and actors. Work flow, and it’s very Easy to follow even for non-technical users

Applications of Activity Diagram:

This diagram is extended to specify the flow between stages that transmit material (eg, gasoline) or energy (eg, torque, pressure).

  • Additional changes allow the diagram to better support continuous behavior and continuous data flow.
  • The UML 2 specification significantly extended the features and scale of activity diagrams beyond their previous classification as a special case of state diagrams.
  • Today, for the 21st century, an activity diagram can be thought of as a flow chart, and UML modelers use activity diagrams to describe it.
  • Also, these diagrams are useful in the following ways:
  • Rules of Business
  • Tasks that happen in parallel
  • A complex chain of multiple use cases
  • Software flow and logic control configuration
  • Processes with decision points and alternative flows
  • Single use cases

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