The document outlines the software development process, focusing on design methodologies and stages, including architectural design, interface design, and component design. It emphasizes the importance of modularity and teamwork in creating high-quality software while describing the roles of various development tools such as compilers, assemblers, and debuggers. Additionally, it highlights the iterative nature of design and the need for understanding different levels of abstraction in system development.

1. SOFTWARE DEVELOPMENT
By:
K.YesuBabu Setty
B.Siva
K.Bhavya
K.Bhargava sri sai
K.Rambabu

2. INDEX
Software system design and development
Development methodologies and tools

3. Software Design
Deriving a solution which satisfies
software requirements

4. Stages of Design
Problem understanding
Look at the problem from different angles to discover the
design requirements.
Identify one or more solutions
Evaluate possible solutions and choose the most appropriate
depending on the designer's experience and available resources.
Describe solution abstractions
Use graphical, formal or other descriptive notations to
describe the components of the design.
Repeat process for each identified abstraction
until the design is expressed in primitive terms.

5. The Design Process
Any design may be modelled as a directed graph made up of
entities with attributes which participate in relationships.
The system should be described at several different levels of
abstraction.
Design takes place in overlapping stages. It is artificial to
separate it into distinct phases but some separation is usually
necessary.

6. Phases in the Design Process
Architectural
design
Abstract
specificatio
n
Interface
design
Component
design
Data
structure
design
Algorithm
design
Sy stem
architecture
Software
specification
Interface
specification
Component
specification
Data
structure
specification
Algorithm
specification
Requirements
specification
Design activities
Design products

7. Design Phases
• Architectural design: Identify sub-systems.
• Abstract specification: Specify sub-systems.
• Interface design: Describe sub-system interfaces.
• Component design: Decompose sub-systems into components.
• Data structure design: Design data structures to hold problem data.
• Algorithm design: Design algorithms for problem functions.

8. Design
Computer systems are not monolithic: They are usually composed of
multiple, interacting modules.
Modularity has long been seen as a key to cheap, high quality
software.
The goal of system design is to decode:
What the modules are
What the modules should be
How the modules interact with one-another

9. Development: Teamwork

10. Code Green. Test Units.

11. Take help of Development Tools
You figured out you need a change in some part, you
could change it, but others’ code can break?
You hardly understand what your friend means by
variable baln or function register()
Your disc crashed and your codes are gone?
You’ve created too many folders like code_old
code_working, code_new2, code_final… now what?
How do you merge everybody’s code to a full-functional
system?

12. Understanding Your Responsibility
You need to
work with a
lot of people!

13. Waterfall Model

14. Spiral

15. Rad

16. Software Development tools
• * Compiler
• * Assembler
• * Linker and Locator
• * Debugger
• * Emulator
• * Simulator
• * Profiler

17.  Compiler :- Software program that converts source code that written in
high level programming language into low level language.
 Assembler:- An Assembler is software program that converts source
code written in assembly language into machine language.
 Linker and Locater:-
 A linker or link editor is a program that takes one or more objects
generated by compilers and assembles them into a single
executable program.
 Locater will produce an output file that contains a binary image
that can be loaded into the target ROM.

18. Profiler:- A Software Program that gathers information about a
program during execution.
Emulator:- An emulator is a piece of Hardware/Software that enables
one computer system to run programs that are written for another
computer system.
Simulator:- Simulator is a piece of Hardware/Software that simulates
another system. This tests the program on the development processor.