Activity modeling is about creating a diagram that represents the dynamic aspects of a system by showing the flow of control from one action to another, and is one of the main UML modeling techniques.
What is an activity model in software engineering?
Activity model is a behavioral model that details the use case model and the sequence model. Generating an activity model is creating an activity diagram for a process. The activity model concentrates on the operations or activities which are nothing but the intermediate steps in a process rather than actors initiating the operation.
What is the difference between activity model and activity diagram?
Activity model is generally used to model the human organizations as they involve the multiple objects that perform the operation concurrently. Activity diagram is a graphical representation of a process where you can identify the intermediate steps of the process along with the progression of steps.
What is the activity model of control?
The activity model concentrates on the operations or activities which are nothing but the intermediate steps in a process rather than actors initiating the operation. Activity model shows the step by step explanation of a process and also explain the flow of control within the process.
What is an example of a business activity model?
In a Business Activity Model, there should only be, at most, one or two Do activities. That’s because a business unit should, ideally, not have more than one or two principal business activities. An example of a do activity may be ‘distribute product’ or ‘provide service’.
What is an activity model?
What is an activity diagram?
What is the initiation and termination of an activity diagram?
How does flow control change in a concurrent activity diagram?
How to tell if an activity diagram has a termination point?
What does it mean when an activity is completed?
When an activity token completes the execution, what happens to the activity token?
See 2 more
What is activity model in SPM?
Activity modeling is a method used to describe the activities and events of the dynamic aspects of a system. The dynamic aspects of a system include all behavior-related components, i.e., the sequence of steps and the events affecting that sequence of steps.
What is activity model in UML?
Activity diagram is another important diagram in UML to describe the dynamic aspects of the system. Activity diagram is basically a flowchart to represent the flow from one activity to another activity. The activity can be described as an operation of the system. The control flow is drawn from one operation to another.
What does an activity diagram model?
An activity diagram visually presents a series of actions or flow of control in a system similar to a flowchart or a data flow diagram. Activity diagrams are often used in business process modeling. They can also describe the steps in a use case diagram. Activities modeled can be sequential and concurrent.
What are the guidelines for activity model?
How to Draw an Activity DiagramStep 1: Figure out the action steps from the use case. Here you need to identify the various activities and actions your business process or system is made up of.Step 2: Identify the actors who are involved. ... Step 3: Find a flow among the activities. ... Step 4: Add swimlanes.
Why is an activity diagram important?
Benefits of activity diagrams Describe the steps performed in a UML use case. Illustrate a business process or workflow between users and the system. Simplify and improve any process by clarifying complicated use cases. Model software architecture elements, such as method, function, and operation.
What is UML stand for?
Unified Modeling LanguageUML, which stands for Unified Modeling Language, is a way to visually represent the architecture, design, and implementation of complex software systems.
What are the elements of activity diagram?
Activity diagram is an advancement of a flowchart that contains some unique capabilities. Activity diagrams include swimlanes, branching, parallel flow, control nodes, expansion nodes, and object nodes. Activity diagram also supports exception handling.
What is the difference between flowchart and activity diagram?
The main difference between activity diagram and flowchart is that activity diagram is a UML behavior diagram that represents the workflow of stepwise activities of the system while flowchart is a graphical diagram that represents the sequence of steps to solve a problem.
What is the difference between state diagram and activity diagram?
UML State machine diagram and activity diagram are both behavioral diagrams but have different emphases. Activity diagram is flow of functions without trigger (event) mechanism, state machine is consist of triggered states.
What is activity diagram in use case?
An activity diagram in the use-case model illustrates the flow of events of a use case. The flow of events of a use case describes what needs to be done by the system to provide value to an actor. It consists of a sequence of activities that together produce something for the actor.
What is the difference between activity state and action state?
Action is a named element which represents a single atomic step within activity, i.e. that is not further decomposed within the activity. Activity represents a behavior that is composed of individual elements that are actions.
How is the activity diagram useful during system development?
The activity diagram helps in envisioning the workflow from one activity to another. It put emphasis on the condition of flow and the order in which it occurs. The flow can be sequential, branched, or concurrent, and to deal with such kinds of flows, the activity diagram has come up with a fork, join, etc.
What is the difference between activity state and action state?
Action is a named element which represents a single atomic step within activity, i.e. that is not further decomposed within the activity. Activity represents a behavior that is composed of individual elements that are actions.
What is the difference between activity diagram and sequence diagram?
The Activity diagram represents the UML, which is used to model the workflow of a system. The Sequence diagram shows the message flow from one object to another object. The Activity diagram shows the message flow from one activity to another. Sequence diagram is used for the purpose of dynamic modelling.
What is the difference between activity diagram and flowchart?
The main difference between activity diagram and flowchart is that an activity diagram is a UML behavior diagram that represents the workflow of stepwise activities of the system while a flowchart is a graphical diagram that represents the sequence of steps to solve a problem. UML stands for Unified Modeling Language.
What is the difference between state diagram and activity diagram?
UML State machine diagram and activity diagram are both behavioral diagrams but have different emphases. Activity diagram is flow of functions without trigger (event) mechanism, state machine is consist of triggered states.
How Do We Use Activity Models?
Because many reactions that affect real rocks involve minerals with solid solutions, activities and activity models are needed to make meaningful thermodynamic calculations. Activity models are essential for application of advanced thermodynamic modeling programs, and more basic geothermometers or geobarometers. For example, the reaction between anorthite, grossular, kyanite and quartz is often used to calculate the pressure at which a rock equilibrated:
What is the activity of a mineral?
Activities are values that describe how reactive a particular end member component is for a given mineral composition. If a mineral is pure (for example, if a garnet is 100% grossular) the activity of the end member (in this example grossular) is 1. If a particular end member is only a minor part of a mineral, its activity will be very small. Activities depend, not only on composition, but also on pressure and temperature (P and T).
How to determine reactivity of a component?
An alternative way to think about a component's reactivity is to consider its chemical potential ( μi ). The chemical potential ( μi) is related to the activity (a) of a component (i) according to the relationship: μi = μio + RTlnaij. In this equation, μi is the chemical potential of the component in a solid solution, μio is the chemical potential of the component in a pure end-member (the molar free energy of the pure phase), and aij is the activity of the component (i) in phase (j). Based on this relationship, one way to think about chemical potential and activity is that aij is a number between 0 and 1 describing the effective amount of a phase that is present, while μi is the reactive energy (usually expressed in joules or calories per mole) that component has.
Why use Business Activity Modelling?
Stakeholder perspectives, and the potential business activities that their view implies, need to be considered in the context of improvement opportunities. Often differing world-views emerge, making it necessary to explore each business perspective individually to facilitate the disconnect and reach a decision on the way forward. Either through compromise agreements and /or resolving the conflicting elements.
What is the doing activity?
The ‘doing’ activities that perform the primary tasks at the heart of the business system.
What are the symbols used in a business activity model?
Three symbols are typically used: an oval for the activities, an arrowed line for indicating the logical dependencies between them and a lightening strike exiting the control activity.
How many business activity types are there?
There are five main business activity types that need to be mapped out, which are built upon from the ‘transformation’ element of the CATWOE Analysis.
What are the types of business activities?
Five types of business activity are represented in a business activity model: Plan: the planning activities that set what must be in place beforehand. Enable: the enabling activities that ensure necessary resources are available. Do: the doing activities that process the primary business system transformation. ...
What is stakeholder perspective?
Stakeholder perspectives, and the potential business activities that their view implies, need to be considered in the context of improvement opportunities. Often differing world-views emerge, making it necessary to explore each business perspective individually to facilitate the disconnect and reach a decision on the way forward. Either through compromise agreements and /or resolving the conflicting elements.
When to Use Activity Diagram
Activity Diagrams describe how activities are coordinated to provide a service which can be at different levels of abstraction.
Activity Diagram - Learn by Examples
The activity diagram example below describes the workflow for a word process to create a document through the following steps:
Activity Diagram - Swinlane
A swimlane is a way to group activities performed by the same actor on an activity diagram or activity diagram or to group activities in a single thread. Here is an example of a swinlane activity diagram for modeling Staff Expenses Submission:
What is an Activity Diagram?
An activity diagram visually presents a series of actions or flow of control in a system similar to a flowchart or a data flow diagram. Activity diagrams are often used in business process modeling. They can also describe the steps in a use case diagram . Activities modeled can be sequential and concurrent. In both cases an activity diagram will have a beginning (an initial state) and an end (a final state).
What is action state?
An action state represents the non-interruptible action of objects. You can draw an action state in SmartDraw using a rectangle with rounded corners.
What does a diamond represent in a decision?
A diamond represents a decision with alternate paths. When an activity requires a decision prior to moving on to the next activity, add a diamond between the two activities. The outgoing alternates should be labeled with a condition or guard expression. You can also label one of the paths "else."
What is object flow?
Object Flow. Object flow refers to the creation and modification of objects by activities. An object flow arrow from an action to an object means that the action creates or influences the object. An object flow arrow from an object to an action indicates that the action state uses the object.
What is an activity model?
Activity model is the activity diagram which expresses the sequence of steps required to form a complex process. The activity diagram displays the flow of control like the conventional flow chart but is considered as the more advance version of it.
What is an activity diagram?
Activity diagram is a graphical representation of a process where you can identify the intermediate steps of the process along with the progression of steps. Activity diagram is used by the developer to understand the complex algorithm and its workflow. As the activity diagram expresses the computation by defining the steps required ...
What is the initiation and termination of an activity diagram?
Initiation of an activity diagram is indicated with a solid circle and an outgoing arrow which enter to an activity that has to be performed first.
How does flow control change in a concurrent activity diagram?
For suppose an activity may transfer the control to another activity which further splits to the concurrent activities so the flow of control will pass to all the concurrent activities. It may also be the case that the flow control in concurrent activities may again combine to a single activity.
How to tell if an activity diagram has a termination point?
As every starting has an ending, the termination of an activity diagram is denoted by the solid circle enclosed by a hollow circle. There can be multiple termination points in an activity diagram. An incoming arrow towards the termination point shows that the control reaches the termination point. As the control reaches the termination point it indicates activity is completed and the activity diagram ends.
What does it mean when an activity is completed?
Completion of activity indicates that an event has been completed and a new activity could be started. The flow of control from one activity to another is represented by an arrow. When the arrow showing the flow of control is unlabeled that means the second activity could not begin until the first activity gets completed.
When an activity token completes the execution, what happens to the activity token?
When the activity with an activity token completes the execution the activity token is moved to the outgoing arrow from the activity. In case the activity has multiple outgoing arrows that too with the condition then the activity token is passed to that successor activity whose executing condition is verified.
Content: Activity Model
Activity Diagram
- Activity diagram is a graphical representation of a process where you can identify the intermediate steps of the process along with the progression of steps. Activity diagram is used by the developer to understand the complex algorithm and its workflow. As the activity diagram expresses the computation by defining the steps required to execute an operation. Like the activ…
Activity Diagram Notations
- 1. Activities Activities are the operations that are arranged sequentially to make up a complex process. Activities are of two types one, which keeps on executing continuously until interrupted. The other kind of activity is one which terminates itself when completed. Completion of activity indicates that an event has been completed and a new activity could be started. The flow of con…
Key Takeaways
- So, this is all about the activity diagram, its behavior and its use. We have tried to detail every element of the activity diagram. We have also covered an example for a better understanding of the activity diagram.