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Program Development Cycle. Skill Area 304.2. Prepared by Dhimas Ruswanto , BMm. Lecture Overview. Program Development Life Cycle Characteristics of a good program Types of errors. Project Management. Program Development Life Cycle. Program Development Life Cycle.

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program development cycle

Program Development Cycle

Skill Area 304.2

Prepared by DhimasRuswanto, BMm

slide2

Lecture Overview

  • Program Development Life Cycle
  • Characteristics of a good program
  • Types of errors
program development life cycle1
Program Development Life Cycle
  • The program development process is part of the software lifecycle, characterized by the following stages:
  • Requirements analysis
  • Design
  • Coding
  • Testing
  • Implementation and support
  • Documentation
requirements analysis
Requirements Analysis
  • An accurate and complete set of client and user requirements is produced to determine the characteristics of an acceptable solution
requirements analysis cont d
Requirements Analysis (cont’d)

The requirements analysis specification

will contain:

  • the proposed system or solution, which has been agreed by the client and developer
  • a list of existing tools, new tools,required facilities and people available for developing the solution
  • a schedule for the next stages of the project, including the deliverables for each stage
design stage
Design Stage
  • Use of proper design techniques to illustrate the program specification in a systematic way
  • Representing the tasks required in the program specification showing all input, processing and output requirements
  • Examples :
    • Flowchart
    • Pseudocode
    • JSP
coding stage
Coding Stage
  • Produce the programs that will make up the system
  • Translation of design into programming language code e.g. C, C++, Pascal, Qbasic
  • aka implementation
  • Complete when all code is written and documented, and compiles without any errors
testing stage
Testing Stage
  • Debugging – Done by Development Team - The task of finding and removing errors/bugs from the program.
  • Testing – Done by Testing Team – The task of locating and identifying of bugs/errors included
testing stage cont d
Testing Stage (cont’d)
  • When the program is completed and all separate modules have been tested, a full test of the program is performed
    • any errors in the program will be corrected and the test repeated
  • Types of Tests:
    • Alpha test
      • test of the finished application completed internally
    • Beta test
      • tested externally
implementation and support
Implementation and Support
  • When all the previous stages have been completed satisfactorily, the system is ready for implementation
  • Program is transferred to the user’s machine and made to work.
  • 3 strategies:
    • The new program may run concurrently with the old one
    • it may completely replaced the old one or
    • It may phased in gradually
implementation and support cont d
Implementation and Support (cont’d)
  • Once the program is installed and operated, it will be monitored for some time to ensure that program is error-free. – Support/Maintenance Stage
  • Maintenance includes error fixing, updates and modifications.
documentation stage
Documentation Stage
  • All processes in all stages during the system development must be documented/written down.
  • This documentation is vital for future reference/for future maintenanceof the program.
characteristics of a good program
CHARACTERISTICS OF A GOOD PROGRAM
  • Correctness – fulfilling user requirements
  • Reliability – it produces correct output and validates input data to avoid program crash
  • Portability – easily installed from one machine to another with minimal modification
  • Maintainability – easily followed and modified, not only to the programmer who wrote it
  • Readability – clearly documented
  • Use of resources – fast in processing, uses minimum storage space and able to run on existing hardware.
types of errors
TYPES OF ERRORS
  • Syntax – error relating to the programming language used
  • Logical – error in programming logic
  • Run-time/execution– error that appears after you compile and run your code
sumamry
SUMAMRY
  • Program Development Life Cycle:
    • Requirements analysis
    • Design
    • Coding
    • Testing
    • Implementation and support
    • Documentation
  • Types of Errors
    • Syntax
    • Logical
    • Run-Time