1. Software Engineering
Lesson #1 – Intro to Software Engineering Software processes
Mkhize, BSc Hons computer Sciences|Dip Merit IT, ICDL, Proj. Management

2. Professional Software Development
Professional Software is usually developed by teams rather than individuals
It is maintained and changed throughout its life
Software Engineering is intended to support professional software development, rather than individual programming

3. Software Software is not just the programs
But also associated documentation and configuration data that is required to make these programs operate correctly
It includes; system documentation, which describes the structure of the system
As well as user documentation, which explains how to use the system
Website for users to download recent product information

4. Software Products Generic Products Customised (or bespoke) Product
Sold on the market to any customer who is available to buy
Customised (or bespoke) Product
Are commissioned by a particular customer

5. Software Engineering Definition Engineering
Is an engineering discipline that is concerned with all aspects of software production
From early stages of system specification through maintaining the system after it has gone into use
Engineering
Is about getting results of the required quality within the schedule and budget

6. Importance of Software Engineering
Individuals and society rely on advanced software systems
Reliable and trustworthy systems are needed economically and quickly
It usually cheaper
Majority of costs are the costs of changing the software after it has gone into use

7. Software Process
Is a sequence of activities that leads to the production of a software product
4 fundamental activities the are common to all software processes
Software specification
Software development
Software validation
Software evolution

8. Software Process Activities
Software specification
Where customers and engineers define the software that is to be produced and the difficulties of its operations
Software development
Where software is designed and programmed
Software validation
Where software is checked to ensure that it is what the customer requires
Software evolution
Where software is modified to reflect changing customer and market requirements

9. Software engineering diversity
Software Engineering takes into account the following
Practical cost
Schedule
Dependability issues
Needs of software customers and producers
There are NO UNIVERSAL engineering methods and techniques that are suitable for systems and all companies
Methods and techniques that are more important – type of application that is being developed

10. Software Engineering and the web
Development of WWW has had a profound effect to all of us
Web was used to primarily a universally accessible info store and it had little effect on software systems
Around 2000, web started to evolve and more and more functionality was added to browsers
It is now cheaper to change and upgrade the software
As there are no need to install the software on every PC – downloads and updates

11. Web-based systems are engineered
Software reuse has become the dominant approach for constructing web-based systems. {how you can assemble them from pre-existing software components and systems – Ms Office
Web-based systems should be developed and delivered incrementally
Web forms with scripting are more commonly used for rich interfaces within web browsers.

12. Software Engineering Ethics
You MUST also behave in an ethical and morally responsible way if you are to be respected as a PROFESSIONAL ENGINEER
TENIOUS NOTION OF PROFESSIONAL RESPONSIBILITY:
Confidentiality
Respect the confidentiality of employers and clients regardless of confidentiality agreement
Competence
Not accept work that is outside of your competence
Intellectual property rights
Be aware of local laws governing the use of intellectual property such as patents and copyright
Computer misuse
Not use your technical skills to misuse people’s computers.

13. Classwork 1
(From a Prescribed textbook – page 31-32), explain the following:
An Embedded System
An Information System
A Sensor-based Data Collection System
A Support Environment

14. Classwork 2
From a Prescribed Textbook – answer the questions under exercises from page 41 to page 42
From 1.1 to 1.10

15. Software Process
Is a set of related activities that leads to the production of a software product.
These activities involves:
Development of software from scratch in a std. programming language Java, C++
New business software is now often developed by extending and modifying existing systems.

16. Fundament Activities for Software Engineering:
Software Specification
Software Design and Implementation
Software Validation
Software Evolution
There are also supporting process activities:
Documentation
Software Configuration Management

17. Process Descriptions Products Roles Pre-and Post-conditions
Which are the outcomes of a process activity
Roles
Which reflect the responsibilities of the people involved in the process
Pre-and Post-conditions
All the requirements have been approved by the customer

18. Software Process Models
Shows the activities and their sequence but may not show the roles of the people involved in these activities
Process model (framework):
The waterfall model
Incremental development
Reuse-oriented Software engineering

19. Thank You For Being Here Today