The basis of software requirement analysis: the model analysis method.
The structured analysis method is applicable to the demand analysis of data processing software. It provides the following modeling tools: data flow diagram, data dictionary, machine learning English language, decision table, and decision tree.
The usage and method of DFD diagram are described here.
DFD-Data Flow digraphs
It specifies
From the above use case diagram model, we can get a general idea of what the use case diagram describes. The following is a detailed introduction.
The use case diagram is used to describe what roles can do through a certain system. The use case diagram focuses on the external performance of the system, the interaction
Collaboration digoal/communication digoal is an interactive diagram that emphasizes the organizational structure between the objects that send and receive messages. A collaboration diagram shows the relationship between a series of objects and those objects, as well as the messages sent and received between objects. Objects are typically named or anonymous class instances, and can also represent instances o
Http://www.cnblogs.com/zhaolijing/archive/2013/02/28/2936321.html UML use case diagram-detailed tutorial
I. Definition of use case diagram:
ByActors and Use Cases)And the relationship between themDescribe system functionsThe dynamic view of is called the use case diagram. Draw a participant (representing a system user) on the example graph to draw a humanoi
Package Diagram introduction and common operations of package diagram in rational
Package chart Introduction
1. Definition: group model elements and provide a namespace for the elements in the group.
2. role: it is easy to understand complex systems and control the connections between various parts of the system structure. Logically, you can modularize a complex diagram
UML Construction Design Model A. Class diagram two. Package Diagram three. Assembly Diagram Four. Deployment Diagram I. Class Diagram 1. Classes: Classes are represented by dig: class names, class properties, operations of classes class Name: First Letter University C
In the process of learning UML class diagram, UML class diagram relation is a problem that must be mastered, and there are six kinds of relationships in UML definition: dependency, genus, association, implementation, aggregation and combination. The definitions and representations of the methods are described below.Introduction to UML class diagram relationshipsD
To create a method:
1,new----Collaboration diagram
2, press F5 conversion according to sequence diagram
Add object links (Figure 2-4-4)(1) Select the Object Link toolbar button.
(2) Click the participant or object you want to link.(3) Drag an object link to the participant or object you want to link.
Add message (Figure 2-4-5)(1) Select the link message or the Reverse Link message toolbar button. (2) Clic
One: Class diagrams (Behavior classes and entity classes)---> class diagrams are used to show the classes in the system and their relationship to each other---> Conceptual layer class Diagram---> Description layer class DiagramSecond: Concept layer class Diagram---> Concept view: Class Diagrams At this level describe the conceptual understanding of problem areas in the real world. ---> at the conceptual lev
First, time series diagramThe time series diagram is an interaction diagram that emphasizes the chronological order, in which the objects participating in the interaction are first placed above the graph and arranged along the x-axis. Usually the object that initiates the interaction is placed on the left, the lower object is placed on the right, and then the messages sent and received by these objects are
Example:
(1) There is a DFD diagram below, where the interval between the vertical dotted line input, transformation, and output, Please convert it into a SC diagram:
Solution: we can see from the figure that the left side of the first vertical dotted line is the input part, the center is the transformation part, and the edge is the output part. As a result, we can know that the level-1 SC
System Modeling must be described in terms of system structure and behavior,Static diagram based on the previous UML diagramBlog learning, we canDrawStatic structure of software systemsIn this case, how should we deal with its behavior activities? This article will be used hereArticleInvolvedUMLThe behavior graph is displayed.
A behavior diagram is used to describe the interaction between the dynamic m
Data Center reconstruction (1) -- UML diagram, Data Center reconstruction -- uml diagram
Finally, we started restructuring. Data Center reconstruction is a very important small project at this stage, because it involves all kinds of knowledge we learned during this time. First, we used the knowledge of softwares, write the document before development, and then use the UML
Mechanical diagram (Force roadmap) combines the common people's life in the diagram, which is more interesting.This article will take this as evidence of how the graph is inserted into the external image and the mechanics of the text.One of the simplest mechanics diagrams is produced in Chapter 9.2. After a lot of friends have questions, the basic questions include:
How to insert text next to a bal
It is more interesting to combine the Mechanics Diagram (Force guide diagram) with the common figure diagrams in life. In this paper, we will explain how to insert external pictures and text in mechanics diagram.One of the simplest mechanics diagrams is produced in Chapter 9.2. Many of our friends have questions, and the main questions are:
How to insert text next to a ball
How to change a ball
After restoring the database backed up by SQL2000 to sql2005, the "database relationship diagram" prompt: the database does not have a valid owner, so you cannot install the database relationship diagram support object "SOLUTION
After restoring the database backed up by SQL2000 to sql2005, the "database relationship diagram" prompt: the database does not have a
First, what is the state diagramPersonally, the process of running a program can be viewed from a certain angle as a process of transition between States. For example: The program is in the state of a, completed an action, can be sent, can be received and so on, then it is in the state of change, into the state two. Then, the description of the state is to record a program execution process. A state diagram is a graph description of all the states tha
CAS (4)--cas browser SSO access sequence diagram detailed (CAS Web Flow Diagram by Example)
Tomcat version: tomcat-8.0.29JDK version: jdk1.8.0_65Nginx Version: nginx-1.9.8CAS version: cas4.1.2cas-client-3.4.1Reference Source:Jasig.github.io:CAS protocolCAS (1)--mac configure CAs to Tomcat (server side)CAS (2)--mac configuring CAs to tomcat (client)Cas (01)--IntroductionCAS (09)--access other CAS appli
State diagram (Statechart Diagram):Describes all possible states of a particular object and the events that cause state transitions.Not all classes need to use a state diagram to describe its behavior, and only those classes that have important interaction behaviors are described using a state diagram.Compositionstate: also known as an intermediate state, represe
1. Must be run in Botulu software Step7, Configuration king and unity to communicate with PLCMust be run in Botulu software Step7, Configuration king and unity to communicate with PLC2. The Configuration king and unity cannot read and write the PLC data because of this setting.3. Add a dense ladder diagram to the PLC, and then want to download a new program, you need to enter this password.When a ladder diagram
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