Rapid Application Development

1
????? ?????? ????? Modern Systems Analysisand
Design
?????? ?????? ???????????
???????? ?? ????? ??? ???? ????-

• 19
• ??????? ??????? ?????? ?????????
• Rapid Application Development

19.1
2
??????? ?????? ????????? Rapid Applications
Development (RAD)

• ???? ?????? ????? ???? ???? ???? ??? ?????
  ??????? ??????? ????????
• ????? ???? ?????? Five key factors
• ?????? ????? ?? ??????????
• ????? ????? ??????Joint Application Design
  sessions
• ??????? ??????? Prototyping
• ???? ????? ??????? ??????? Integrated CASE tools
• ?????? ??????? ?????? Code generators

19.2
3
????? ??????? ?????? ????????? The Process of
Developing an Application Rapidly

• RAD ?? ?????????? ???? ???? ???? ?????? ?????
• ??????? Goals
• ?????? ??????? ????? ?????
• ?????? ???? ?? ???? ?? ???? ????? ???? ?? ???
  ?????????? ?????????
• ???? ??????? ??????? ?? ?? ?????????? ?????
• ??????? ????????? ???? ? ???? ?????? ??????
• ??????? ????? ?? ??????? ???????? (????? ?????)

???????? Components of RAD

• ?????? ????? ?? ??????????
• ??????? ??????? ???? ?? ????? ?????? ?????? JAD
• ????? ??????? ??????? Prototyping ???? ?????
  ??????? ?? ?????? ??????? production system
• ?????? CASE ?? ????? prototypes

19.3
4
??????? Approaches to RAD

• ????? ?????? Martins pillars of RAD
• ??????? ??????? Four pillars
• ??????? Tools
• ????? People
• ???????? Methodology
• ??????? Management
• ?????? ??? RAD ???? ???????? ??? ?? ???? ???? ??
  ???? RAD ? ??? ?????? ????? ?? ???????? ?????????
  ???????? ????
• ????? ? ?? ????? ? ?? ???? ??? ??????? ??? ????
  ?? ??????? ??????? ?? ??? ????? ?????????
  ????????? ? ?? ???? ???????

19.4
5
??????? Approaches to RAD

• ????? ??????? McConnells pillars of RAD
• ??????? ??????? Four pillars
• ???? ??????? ????????? ..?? ??? ????
  ??????? ???????? ?? ??????? ??? ??????? ????
  ???? ??????? ?? ????? ??? ???? ????????? ??
  ??????? ??? ????? (?? ???? ??? ??? ????)
• ?? ?? ??? ??????? ????????? ...??
• Table 19-1 lists some of McConnells 36 classic
  development mistakes
• ??? ??????? ?? ???? ??? ??????? Development
  mistakes
• ????? ?????? (??? ??? ???? ????????? ???????
  ?????? ???????)
• ???? ?????? (???????? ??? ????????? ????? ??
  ????? ???? ?????? ??? ???????)
• ??????? ???????? ???????
• ??????? ??????? ?? ??????

19.5
6
??????? Approaches to RAD

• ??????? ???????? Software tools
• CASE tools can be used for
• Prototyping
• Code generation
• ???? ...?
• ???? ??????? ??????? Visual Development
  Environments
• Visual Basic
• Delphi

?????????
?????????
19.6
7
??????? Approaches to RAD

• ???? ?????? ??? ????? ??????Martins RAD Life
  Cycle
• ???? ??????? ?????? ?? ???? ?????? ?? ?????
  ?????? ???????
• ??????? User Design
• ????? JAD
• CASE tools are used to support prototyping
• ?????? Construction
• Designer creates code using code generator
• End user validates screens and other aspects of
  design
• ??????? ???????? Cutover
• New system is delivered to end users

19.7
8
??? ???? RAD Success Stories

• VisualAge for Java
• Comdata
• Modular Over the Road System (MOTRS)
• IBM Global Services chosen as vendor
• Servlets
• Programming modules that expand the functions of
  the Web server
• Applets
• Embedded code run from client browser
• Nine months to completion
• Three months of research
• Three months of coding
• Three months of testing

19.8