Unit 1 sepm introduction to software
- 1. Subject: Software Engineering & Project Management Topic: Introduction to Software
- 2. 08/07/18 2 The Product What is it? – Is the product that software engineers design and build. – Encompasses programs that executes within a computer of any size and architecture. Who does it? – Software engineer and virtually everyone in the industrialized world uses it either directly or indirectly. Why is it important? – It affects nearly every aspects of our lives and has become pervasive in our commerce, our culture and our everyday activity.
- 3. 08/07/18 3 The Product What are the steps? – By applying a process that leads to a high-quality result that meets the needs of the people who will use the product. (Software Engineers Approach) What is the work product? – Programmers point of view- the programs, documents, and data that are computers software. Users point of view- the resultant information that somehow makes the users world better.
- 4. 08/07/18 4 The Evolving Role of Software • Plays dual role • The product • The vehicle for delivering the product • Software is an information transformer- • Produces • Manages • Acquires • Modifies • Displays • Software acts as the basis for • The computer (Operating System) • The communication of information (Networks) • The creation and control of other programs (Software tools and environments)
- 5. 08/07/18 5 • Software delivers the most important product of our time • Software transforms personal data • It manages business information to enhance competitiveness • Provides a gateway to worldwide information networks • Provide means of acquiring information in all of its forms The Evolving Role of Software
- 6. 08/07/18 6 Software • Software is instruction that when executed provide desired function and performance. • Is a data structure that enable the programs to adequately manipulate information. • And documents that describes the operation and use of the program.
- 7. 08/07/18 7 Software Characteristics • Different from hardware. • Software is developed or engineered, it is not manufactured in the classical sense. • Software doesn’t wear out. • Although the industry is moving towards component based assembly, most software continues to be custom built.
- 8. 08/07/18 8 Failure Curve for Hardware
- 9. 08/07/18 9 Failure Curves for Software
- 10. 08/07/18 10 Software Applications System Software • Written to service other programs • Real Time Software • That monitors/ analyzes/ controls real time events • Business Software • Business information processing system • Engineering and Scientific Software • Characterized by “Number Crunching” algorithms. • Embedded Software • Resides in read-only- memory and is used to control products and systems for the consumer
- 11. 08/07/18 11 • Personal Computer Software • Word processing, spreadsheets etc.. • Web Based Software • Web pages retrieved by a browser is a software • Artificial Intelligence • Make use of non-numerical algorithms to solve complex problems that are amenable to computation or straightforward analysis. • Eg Expert Systems, Pattern Recognition etc…. Software Applications
- 12. 08/07/18 12 Categories of Computer Software Application Domains: • Consists of standalone programs that solve a specific business need. • used to control various business applications in real time. • It helps a computer user to perform specific tasks. • People use application software according to their needs. • It is also known as application package.
- 13. 08/07/18 13 Categories of Computer Software WebApps (Web applications) : network centric software. As web 2.0 emerges, more sophisticated computing environments is supported integrated with remote database and business applications. Product-line software: focus on a limited marketplace to address mass consumer market. (word processing, graphics, database management)
- 14. 08/07/18 14 Categories of Computer Software MobileApps : Cloud Computing :
- 15. 08/07/18 15 References Software Engineering - A practitioner's Approach by Roger S. Pressman