1. Program Development Cycle
Skill Area 304.2
Prepared by Dhimas Ruswanto, BMm

2. Lecture Overview Program Development Life Cycle
Characteristics of a good program
Types of errors

3. Project Management

4. Program Development Life Cycle

5. 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

6. Requirements Analysis
An accurate and complete set of client and user requirements is produced to determine the characteristics of an acceptable solution

7. 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

8. 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

9. 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

10. 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

11. 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

12. 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

13. 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.

14. 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 maintenance of the program.

15. 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.

16. 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

17. SUMAMRY Program Development Life Cycle: Types of Errors
Requirements analysis
Design
Coding
Testing
Implementation and support
Documentation
Types of Errors
Syntax
Logical
Run-Time