1. What is system analysis and design by student19

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									1. What is system analysis and design?



   1.1 Outline of system analysis and design

   1.2 Problems of analysis and design

   1.3 User-analyst communication




                        1. What is system analysis and design   1-1
1.1 Outline of system analysis and design
                Analysis                                                    Design
 What is the system under development supposed to do?          How, exactly, can this system be implemented?




                                                                                                    &%$*!%
                                                                                                    &%$#@

                                                          What hardware?                        Which programming
                                                                                                language?




                                                               Examine the elements that are related to implementation
The developers all must have the same concept of the system.   and affected by changes to the system environment!


                                                  1.1 Outline of system analysis and design                         1-2
Outline of system analysis
Analysis : 1. Business Analysis (Survey -> Business Modeling)
           2. To determine the range of computerization
An example of business model of a certain clinic

                                                                   Check Medical Chart         Calculate Fee
                          Check Medical Chart                      Treatment                   Receive Fee
                          Assign schedule                          Write prescription          Issue Medicine
            Reservation                                            Write Medical chart
                                                   Treatment
                                                                                           Account
             Medical                                                 Medical
             Chart                                 Prescription
                                                                     Chart
                                                                                           Money
                          Receptionist
                                                                                                             Cashier
                                                                                          Medicine
 Patient                  Check schedule                          Implement
            Reception
                          Reception
                                                                  Medicine
             Medical            Insurance                                      Prepare
             Chart              Card            Doctor                         Medicine

                                                                                                Pharmacist
                                                             Receive Prescription
                              Registration                   Prepare Medicine                          Prescription
                              Card                           Issue Medicine               Medicine




                                                1.1 Outline of system analysis and design                          1-3
Outline of system design
Design: 1. Determine how to implement the analysis models

                                                                  DB
                                           Retrieve        Schedule Master DB
                                                           Patient Information
 Business Model
                                                                     Master DB
                                                           Medicine
                                           Update          Information Master
                                                                            DB
                                                            etc.

                         Inquire Reservation information
                         Output Treatment Schedule List
                         Create the medical chart
                         Create the Prescription
                         Issue the medical card
                                    etc.


                         AP design       Network design        Database design

                               1.1 Outline of system analysis and design         1-4
1.2 Problems of analysis and design


  Major problems of analysis and design


  1. Poor communication
  2. Many changes of computer system requirements
  3. The size of the target system




                           1.2 Problems of analysis and design   1-5
1.3 User-analyst communication

                               Development plan


                                                            system analyst

              Request                                                    Requested specifications

                        System development client




     system users
                                                            system designer
                    Services


                                                                        Design
                                system operator


                                                  Program


                                                                programmer

                                      User                  Developer


                                                        1.3 User-analyst communication              1-6
Summary
Analysis and Design
 Analysis : Business Analysis (Survey -> Business Modeling)
            determine the range of computerization
 Design : Determine how to implement the analysis models

Major problems of analysis and design
  1. Poor communication
  2. Many changes of computer system requirements
  3. The size of the target system




          Structured Analysis and Design

                                                           Summary   1-7

								
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