Activity Diagrams & UP
Activity diagram Principle & application
Activity Diagrams use Petri Net formalism to represent various flows, their timing & order
ADs are used to model
Dynamic behavior or
Operations
ADs are used for
UseCases,
Classes,
Interfaces,
Components,
Collaborations,
Operations
See the next slide
Other UML diagrams for data flows
For software modeling and design also Activity Diagrams are used, but
There are more appropriate diagrams for software modeling
Sequence and Communication Diagrams
It is better to use them
Some Anomalies of NODES & EDGES
Use Cases and Activity Diagrams
ADs is for PROCESS but
UseCase is NOT a process
It is a DIALOG (See 1C) or CONVERSATION
A bunch of messages
We need a symbol for it
UseCase needs a Dialog symbol NOT an AD
We used an oval with a bunch of messages
BPMN uses a HEXAGON
It expands into a bunch of messages
Some interactions ARE UseCASE DialogS
When a sub-process involves only a single computer and a single user
The messages between them constitute a UseCase Dialog
One difference is that in a UseCase the focus is ON messages of exchange but
NOT on the internal activities of either the User or the System
Flowing Through & getting transformed
To be precise,
Tokens DO NOT flow through nodes
They flow through edges
They get transformed at nodes
Electronic Payment A Complex PROCESS
It involves FOUR entities all of which are systems. Each system can be a System under Consideration and its own UseCase Diagram different from those of other systems.
One has to start with Activity Diagram of the PROCESS and then proceed to UseCase Modeling for each system separately
Analyze independently & integrate
The complexity of the main process is not overlooked but
Each sub-process is ...
... middle of paper ...
...ect flows
The flow lines are
Of the same TYPE
What flows in,
The NODE,
What flows out,
Are also the same
Inconsistencies of Object Node & Flows
The input and output edges of “object nodes” are “Object Flows”
These are special types of flows that represent the movement of objects shown as nodes.
The objects themselves are created and consumed by NORMAL Action Nodes
Object Flows in BPMN convention 1
Flow of Controls, messages & objects are well distinguished
Object “Order” flows A1 to A2
Along doted line (non-physical path)
The object is shown ON the dotted path but it is NOT a NODE
Not an elegant notation.
Object Flows in BPMN Convention 2
Here the control flow is from A1 to A2
And object flow is also form A1 to A2
So, the object is “associated” with the control flow (as in Association Class of UML)
This is much simpler and conflict-fee
Takes less space too.
The following four texts apart of the Culminating Activity were all related to the Apollo 11 mission in 1969, which had first put a man on the moon. The first article was from the Times of London, and served to describe the events of the moon landing from the astronaut's point of view. The article used anecdotal evidence to describe Aldrin and Armstrong's experience in order to inform the audience of what had occurred, as well as the reactions in several different countries.. The speaker is a from a reputable news source, The Times, and is informing the European audience - as this event was apart of America’s space program, NASA - of the landing as a great success. Although
The project has to assemble a set of requirements drafted out before hand, which will be used to decide if the overall result meets the satisfactory conclusion. The requirements are split into two categories, the so-called functional that will state what the system will do and the non-functional that will enunciate how the system will do it.
Stage 3 involves creating an Architectural Model version of the whole system including sub systems. A Viewpoint Hierarchy shows a skeleton version of the system which can be ins...
Use Cases is the best technique to figure out the technical aspects of the system, it help you understand the functionality of the system and its interaction with the humans (Actors), the Use Case Diagram is best to present your requirements in terms of processes and it allows you sort out any errors before the implementation of ...
Meadows, D. H. (2008). Chapter 1. In Thinking in systems (p. 12). White River Junction, VT: Chelsea Green publishing company.
This system will be based on making choices for the support system. It can be used by manger and senior in a business and they will get information about how the business how it operate and they can see and manage how efficient a company like John Lewis is
This section provides an overview and a brief description of the system design. The system structure, the database design, and the user interface
Emily wanted to perform an exercise of her choice twice a week using verbal prompting plus (3 or more) at 75% accuracy this quarter. She achieved her desired accuracy level each month; however she did not meet her desired frequency during any of the months.
Child sexual abuse is a serious and treacherous offence. The World Health Organization defines child sexual abuse as any sexual activity which the child does not comprehend and so, is unable to give informed consent. The Canadian Family Violence Law’s definition of child sexual abuse is any activity in which an offender uses a child for sexual purposes. The child maltreatment section under Health Canada states that child sexual abuse activities include fondling, intercourse, incest, sodomy, exhibitionism, and commercial exploitation through prostitution. It is no doubt that child sexual abuse is a crime throughout the world. However, slight emphasis is given to the causes of this crime. The goal of this essay is to give an intricate understanding
The articles: Activity Theory; An Introduction for the Writing Classroom by Elizabeth Wardle and Donna Kain, Rigid Rules, Inflexible Plans, and the Stifling of Language: A cognitivist Analysis of Writer’s Block by Mike Rose, Revision Strategies of Student Writers and Experienced Adult Writers by Nancy Sommers, and Writing is a Social and Rhetorical Activity by Kevin Roozen, all contain similar concepts that are in relation to each other. These concepts are the crucial points that happen when writing a well-developed piece. The concepts that will be mentioned can either improve or hinder the piece of writing. The concepts of the linear structure, plans, feedback and the activity system are what make a piece of writing flow into its final stages.
Later in the chapter it shows examples of the models created for the business, application and technology layer. Gives us specific techniques and terms needed that are used in the models.
The Unified Modeling Language is a standard language for specifying, visualizing, constructing, and documenting the artifacts of software systems, as well as for business modeling and other non-software systems. The key is to organize the design process in a way that clients, analysts, programmers and other involved in system development can understand and agree on. The UML provides the organization. The UML was released in 1997 as a method to diagram software design, by some of the best minds in object oriented analysis and design. It is by far the most exciting thin to happen to the software industry in recent years. Every other engineering discipline has a standard method of documentation. Electronic engineers have schematic diagrams; architects and mechanical engineers have blueprints and mechanical diagrams. The software industry now has UML.
Object-orientated programming is methodology which is organized around objects and not actions. The perspective that this approach takes is that it is easier to compare objects. Object-orientated programming can be used in conjunction with UML, and within Object-orientated programming and there are various different methods. Object-orientated programming can be defined as constructing a model of a real world through combining data and actions.
Requirements engineering begins during the communication activity, continues into the modeling activity, and builds a bridge from the system requirements into software design and construction. Through requirements engineering, there is an examination of the context of software work performed. It is essential for the software engineering team to understand all requirements of a problem before the team tries to solve the problem. An identification of specific needs that the design and construction must address is also included. Further is a need for the identification of the priorities that guides the order for the completion of work. This i...