system analysis and design methods 7th whitten bentley

... Modern Systems Analyst  Preparing For a Career as a Systems Analyst Systems Analysis and Design Skills   All systems analysts need thorough and ongoing training in systems analysis and design Systems ... What is a Systems Analyst?   Systems analysts are people who understand both business and computing Systems analysts study business problems and opportunities and then transform business and information ... Systems Analyst Who Should Read This Book  The Systems Analyst - A Key Resource  The systems analyst performs systems analysis and design  Systems analysis is the study of a business problem domain

Ngày tải lên: 10/01/2018, 16:08

... with system-to-system interfaces  System designers have to design the system-to-system interfaces that allow a new information system to transparently interoperate with previously designed systems ...  System Designers’ View of Interfaces  System designers must be concerned the details of both user and system interfaces  System designers are concerned with consistency, completeness, and ... Information System Building Blocks Building Blocks - Expanding The Information System Framework  Building Blocks of Interfaces  System Designers’ View of Interfaces (continued)  System designers

Ngày tải lên: 10/01/2018, 16:08

... refine and improve the system Information System Development INFORMATION SYSTEMS FRAMEWORK SYSTEM OWNERS (scope) System Development FOCUS ON SYSTEM DATA FOCUS ON SYSTEM PROCESSES FOCUS ON SYSTEM ... cycle consists of four phases:  systems survey  systems analysis  systems design  systems implementation  A fifth activity, systems support, refines the resulting system by iterating through ... and foremost, a problem-solving approach to building systems The classical problem-solving approach is as follows:  Study and understand the problem (opportunity, and/or directive) and its system

Ngày tải lên: 10/01/2018, 16:08

... system users Systems Analysis SYSTEM ANALYSIS Survey and plan the project Documentation Repository Project and System Scope Study and analyze the existing system Documentation Documentation System ... What is System Analysis? Strategies for Systems Analysis and Problem Solving The Survey Phase of Systems Analysis The Study Phase of Systems Analysis The Definition Phase of Systems Analysis ... What is System Analysis?   For this presentation we will use the following definition:  Systems analysis is (1) the survey and planning of the system and project, (2) the study and analysis

Ngày tải lên: 10/01/2018, 16:08

... is systems modeling and what is the difference between logical and physical system models? What is data modeling and what are its benefits? Can you recognize and understand the basic concepts and ... requirements, and physical system models to depict technical designs Data Modeling An Introduction to Systems Modeling  Systems Modeling  Systems analysis activities tend to focus on the logical system ... Modeling System Concepts for Data Modeling  System Concepts   Most systems analysis techniques are strongly rooted in systems thinking  Systems thinking is the application of formal systems

Ngày tải lên: 10/01/2018, 16:08

... logical system models to depict business requirements  They use physical system models to depict technical designs Process Modeling An Introduction to System Modeling  System Models  Systems analysis ... (Structured English and decision tables), respectively? Process Modeling An Introduction to System Modeling  System Models    System models play an important role in systems development Systems analysts ...   What is systems modeling and what is the difference between logical and physical system models? What is process modeling and what are its benefits? What are the basic concepts and constructs

Ngày tải lên: 10/01/2018, 16:09

... Diagram SYSTEM DESIGNERS (specification) SYSTEM BUILDERS (components) Database Technology (and standards) Software (and Hardware) Technology Interface Technology Networking Telchnology (and standards) ... of similar systems; surveys of users and management; and interviews of users and management The fastest method of collecting facts and information, and simultaneously constructing and verifying ... Interface Technology Networking Telchnology (and standards) (and standards) (and standards) Definition Phase (establish and prioritize business system requirements) Network Modeling Network Modeling

Ngày tải lên: 10/01/2018, 16:09

... Modeling   The approach of using object modeling during systems analysis and design is called object-oriented analysis  Object-oriented analysis (OOA) techniques are used to (1) study existing ... modeling and what are its benefits? What are the basic concepts and constructs of an object model? How you read and interpret an object model? What is data modeling in the context of systems analysis? ... identifying objects within the systems environment, and the relationships between those objects Object Modeling System Concepts for Object Modeling  Objects, Attributes, Methods, and Encapsulation  

Ngày tải lên: 10/01/2018, 16:09

... Introduction What is System Design? Strategies For System Design Fast System Analysis Methods The Configuration Phase of Systems Design The Procurement Phase of Systems Design The Design and Integration ... other design specialists to confirm the design 115 Systems Design and Construction The Design and Integration Phase of Systems Design  Activity: Present and Review Design    Roles  Systems ... interface design  Systems builders - may prototype the inputs and outputs for the system 105 Systems Design and Construction The Design and Integration Phase of Systems Design  Activity: Design

Ngày tải lên: 10/01/2018, 16:09

... information system design? What are the make versus buy alternatives and variations for information system design? What are the user and system interface alternatives for information system design? ... server and all file and database access and update commands and instructions are executed on the server computer All data is stored on the server and all file and database access and update commands ... network topology and technology, user interface(s), and/or processing methods • Project objectives that were defined at the beginning of systems analysis and refined throughout systems analysis • Feasibility

Ngày tải lên: 10/01/2018, 16:09

... Database Design Information System File File Information System File Information System Database (consolidated & integrated data from files) File Information System Information System Database Design ... file-based systems and applications become candidates for reengineering, the trend is overwhelmingly in favor of replacing file-based systems and applications with database systems and applications ... database design, system builders will construct those data structures using the language and tools of the chosen database technology Database Design INFORMATION SYSTEMS FRAMEWORK FOCUS ON SYSTEM

Ngày tải lên: 10/01/2018, 16:09

... security will be handled Prototypes should demonstrated how error handling with be accomplished 46 Input Design and Prototyping 47 Input Design and Prototyping (b) (a) 48 Input Design and Prototyping ... Design and Prototyping (a) (b) 49 Input Design and Prototyping 50 Input Design and Prototyping How to Prototype & Design Computer Inputs  Step 4: If Necessary, Design or Prototype the Source Document ... is often omitted), and logos 51 Input Design and Prototyping How to Prototype & Design Computer Inputs  Step 4: If Necessary, Design or Prototype the Source Document  A well-designed source document

Ngày tải lên: 10/01/2018, 16:09

... outputs, and perform test customization capabilities 32 Output Design and Prototyping 33 Output Design and Prototyping 34 Output Design and Prototyping 35 Output Design and Prototyping 36 Output Design ... exceptions to some condition or standard 10 Output Design and Prototyping 23 Output Design and Prototyping Principles & Guidelines for Output Design  Output Media and Formats  Alternative Formats ... letters 26 Output Design and Prototyping Principles & Guidelines for Output Design  System User Issues for Output Design  The following general principles are important for output design:  Computer

Ngày tải lên: 10/01/2018, 16:09

... Interface Design and Prototyping 50 User Interface Design and Prototyping 51 User Interface Design and Prototyping 52 User Interface Design and Prototyping 53 User Interface Design and Prototyping ... buttons and menu options, and other look-and-feel conflicts may need to be resolved 46 User Interface Design and Prototyping 47 User Interface Design and Prototyping 48 User Interface Design and ... commands and properties for the user to complete a task User Interface Design and Prototyping Pull-down Menu 10 User Interface Design and Prototyping Display Features That Affect User Interface Design

Ngày tải lên: 10/01/2018, 16:09

... program that is easier to implement and maintain Software Design INFORMATION SYSTEMS FRAMEWORK FOCUS ON SYSTEM DATA FOCUS ON SYSTEM PROCESSES FOCUS ON SYSTEM INTERFACES SYSTEM OWNERS (scope) Business ... RANSACTION T YPE C Software Design Structured Design  Transaction Analysis  The primary difference between transaction analysis and transform analysis is that transaction analysis recognizes that ... to be added to handle data access and maintenance  DFDs must be revised to include editing and error handling processes, and processes to implement internal controls Software Design D DATA STORE

Ngày tải lên: 10/01/2018, 16:09

... completing object design? How you construct an Ideal Object Model Diagram, CRC Card, and Object Interaction Diagram? Object-Oriented Design An Introduction to Object-Oriented Design  Design Objects ... makes the maintenance, enhancement, and abstraction of objects simpler and easier to manage Object-Oriented Design An Introduction to Object-Oriented Design  Design Objects  The three object ... Object-Oriented Design The Process of Object Design  Modeling Object Interactions and Behaviors that Support the Use Case Scenario  Step - Identify Object Behaviors and Responsibilities  Analysis

Ngày tải lên: 10/01/2018, 16:09

... OrderAppDir.Rights=copy Networking Telchnology (and standards) (and standards) (and standards) Construction Phase Systems Implementation System Owners Approval to continue project Build and Test Networks Installed ... techniques, and steps? Systems Implementation What is Systems Implementation?  What is Systems Implementation?  Systems implementation is the construction of the new system and the delivery of that system ... into systems design  The key input is the network design requirements defined during systems design Systems Implementation The Construction Phase of Systems Implementation  Activity: Build and

Ngày tải lên: 10/01/2018, 16:09

... performed in systems analysis, design, and implementation Systems Support System Owners Project Repository Existing & Revised Models Planning Directive Systems Planning Project System Models ... driven by systems designers and system builders in support of system users Systems Support Errors Encountered When Using the System Correct Errorrs System Users Code with Bug(s) System "Crash" Restored ... system enhancement • The objective of system enhancement is to modify or expand the application system in response to constantly changing requirements 20 Systems Support Systems Enhancement and

Ngày tải lên: 10/01/2018, 16:09

... and Design? System development can generally be thought of having two major components: systems analysis and systems design. In System Analysis more emphasis is given to understanding the details ... done. 2.2.3. Design of System After the system has been analyzed by the analyst, the design stage of system life cycle begins. In design phase, the structure or design for the proposed system is ... between analysis and design? Can one begin to design without analysis? Why 2.11. Summary of System Development Life Cycle Models Key points covered in this lesson are >>The system& apos;s...

Ngày tải lên: 27/10/2013, 23:15

... three-phase system are only half those of the three separate single-phase systems, and the line-voltage drop between the source and load in the three-phase system is half that of each single-phase system. ... maintaining system standards and reliability. NERC coordinates its e¤orts with FERC and other organizations such as the Edison Electric Institute (EEI) [10]. As shown in Figure 1.3, the transmission system ... functions for both the distributed energy system and the local electric power system that allow paral- leling and disconnection from the electric power system. These power electronic interfaces...

Ngày tải lên: 30/03/2014, 07:20