The purpose of the activity diagram is to model the procedural flow of
actions that are part of a larger activity. In projects in which use cases are
present, activity diagrams can model a specific use case at a more
detailed level. However, activity diagrams can be used independently of
use cases for modeling a business-level function, such as buying a concert
ticket or registering for a college class. Activity diagrams can also be used
to model system-level functions, such as how a ticket reservation data
mart populates a corporate sales system's data warehouse.
Because it models procedural flow, the activity diagram focuses on the
action sequence of execution and the conditions that trigger or guard
those actions. The activity diagram is also focused only on the activity's
internal actions and not on the actions that call the activity in their process
flow or that trigger the activity according to some event (e.g., it's 12:30
on April 13th
, and Green Day tickets are now on sale for the group's
Copyright Rational Software 2003 http://www.therationaledge.com/content/sep_03/f_umlbasics_db.jspsummer tour).
Although UML sequence diagrams can protray the same information as
activity diagrams, I personally find activity diagrams best for modeling
business-level functions. This is because activity diagrams show all
potential sequence flows in an activity, whereas a sequence diagram
typically shows only one flow of an activity. In addition, business
managers and business process personnel seem to prefer activity
diagrams over sequence diagrams -- an activity diagram is less "techie" in
appearance, and therefore less intimidating to business people. Besides,
business managers are used to seeing flow diagrams, so the "look" of an
activity diagram is familiar.
(reference by http://www.ibm.com/developerworks/rational/library/content/RationalEdge/sep03/f_umlbasics_db.pdf)
Activity or PERT Diagrams (or Charts) are mainly used to document the schedule of complex projects visually. The critical path can also be established from the PERT Diagram.
A dummy task is a task representing nothing (no actual work done), but is there only to clarify the activity network diagram. Source: http://www.pmhut.com/critical-path-mapping-with-activity-network-diagrams
Network diagram also do not clearly show time line for a project. Large networks require dedicated maintenance and analysis. Network diagram do not lead themselves to easy reproduction or distribution. Tools and system can be expensive to acquire and maintain.
provides data for decison makers and personnel to evaluate an operation/activity and to determine if RM strategies need to be modified for future efforts (on or off duty)
E.R diagram of hotel
Activity on node is a diagram where every node (circle) represents an activity.
the purpose of the venn diagram is to know what are the differences and the similarities between them.
i knew how to draw the activity diagram fro video rental system but i dont know how to attach it here
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It is a hybrid between Use Case and Sequence Diagram
Purpose of recreational activity
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Is a diagram with the same purpose as a Venn diagram, but shaped as an H. the differences go on the left and right of the diagram while the similarities go in the middle
Is a diagram with the same purpose as a Venn diagram, but shaped as an H. the differences go on the left and right of the diagram while the similarities go in the middle
purposes of the piper diagram
the purpose of cocaine is to stimulate or accelarate your brain activity.
A seismograph is a diagram that shows the activity of an earthquake. The longer the line on the diagram, the more violent the shaking of the ground is.