Trường Đại học Công nghiệp Tp.HCM Khoa Công nghệ Thông tin Introduction of Software Engineering Introduction of Software Engineering GV: Lê Ngọc Tiến Email: letien.dhcn@gmail.com Blog: http://tienhuong.wordpress.com 2 What is Software Engineering (SE) What is Software Engineering (SE) • Software has become Software has become critical critical to advancement in to advancement in almost areas of human endeavour. However, there are almost areas of human endeavour. However, there are serious problems serious problems in in cost cost , , timelines timelines , , maintenance maintenance and and quality quality of many software of many software products. products. • Software engineering has the Software engineering has the objective objective of solving the of solving the problems of software by producing problems of software by producing good good quality quality , , maintainable maintainable software, software, on time on time , , within budget within budget . . 3 Definition of Software Engineering Definition of Software Engineering • Software engineering is the establishment and use of Software engineering is the establishment and use of sound sound engineering engineering principles principles in order to obtain in order to obtain economically software that is reliable and works economically software that is reliable and works efficiently on real machines efficiently on real machines • A discipline whose aim is the production of A discipline whose aim is the production of quality quality software, software that is delivered software, software that is delivered on time on time , , within within budget budget , and that , and that satisfies its requirements. satisfies its requirements. 4 Software Software Consist of: • Programs • Documents • Procedures used to setup and operate the software system ( Program is a subset of software, or Software is a superset of programs ) 5 Software applications Software applications • System Software: System Software: a collection of programs which a collection of programs which provide service to another programs (compilers, provide service to another programs (compilers, operating systems, drivers…) operating systems, drivers…) • Real Time Software: Real Time Software: used to monitor, control and used to monitor, control and analyze real world events as they occur (weather analyze real world events as they occur (weather forecasting) forecasting) • Embedded Software: Embedded Software: placed in ROM of the placed in ROM of the product and control various functions of product product and control various functions of product • Business Software: Business Software: designed to process business designed to process business applications (employee management, account applications (employee management, account management…) management…) 6 Software applications (cont) Software applications (cont) • Artificial Intelligence Software Artificial Intelligence Software : : used to solve used to solve complex problems that are not amenable to complex problems that are not amenable to computation (artificial neural network, signal computation (artificial neural network, signal processing…) processing…) • Web based Software Web based Software : : the software related to web the software related to web applications (HTML, DHTML…) applications (HTML, DHTML…) • Engineering and Scientific Software: Engineering and Scientific Software: Huge Huge computing is required to process data (CAD/CAM computing is required to process data (CAD/CAM package, MATLAB…) package, MATLAB…) 7 The Attributes of Good Software The Attributes of Good Software • Maintainability Maintainability Software must evolve to meet changing needs Software must evolve to meet changing needs • Dependability Dependability Software must be trustworthy Software must be trustworthy • Efficiency Efficiency Software should not make wasteful use of Software should not make wasteful use of system resources system resources • Usability Usability Software must be usable by the users for which Software must be usable by the users for which it was designed it was designed 8 Terminologies Terminologies • Product: Product: what is delivered to customer, it may include: source code, specification document, user manual… • Process: Process: is the way we produce software. It is a collection of activities that leads to (a part of) a product. An efficient is required to produce good quality products. 9 Terminologies (cont) Terminologies (cont) • Deliverable: Deliverable: What are generated during software development, example: source code, user manual… • Milestone: Milestone: the events that are used to ascertain the status of the project, example completion of design documentation is milestone. 10 Terminologies (cont) Terminologies (cont) • Generic and Customized Software products: Generic and Customized Software products: – Generic products: developed for anonymous customers, example operating system… – Customized products: developed for particular customers. [...]...Role of Management in Software Development • The management of software development is dependent on four factors: People 1 Project 4 Dependency Order 2 Product 3 Process 11 1 - PEOPLE • Require good manager: A good manager can not ensure the success of the project but increase the probability of success • Manager face challenges: – – • Plan for the... • Plan for the best Be prepared for worst, expect surprises, but continue to move forward anyway The responsibility of manager: Motivate, encourage, guide and control the people of his/her team 12 2 - PRODUCT • Product is what we want to deliver to customers So the objective and scope of work should be defined clearly • It may help the manager to select the best solution within constraints imposed by... delivery deadlines, budgetary restrictions, personnel availability 13 3 - PROCESS • The process is the way in which we produce software • If the process is weak, the end product will undoubtedly suffer • There are many life cycle models process improve models Depending on the type of project, a suitable model is selected 14 4 - PROJECT • A proper planning is required to monitor the status and to control . quality quality of many software of many software products. products. • Software engineering has the Software engineering has the objective objective of solving. software, software, on time on time , , within budget within budget . . 3 Definition of Software Engineering Definition of Software Engineering • Software