7.2 Listening
that Git was first introduced and it has evolved a lot over time. It is very user-friendly, very fast, very efficient and it can easily manage large projects. For a single developer, version control is extremely important, as it allows them to revert to earlier versions when they have introduced errors into the code. This saves them from rewriting code they have already written. For teams of developers, version control is crucially important because it allows them to coordinate their code. Without version control, modern software development in its current form would not be possible. A part of development which is often overlooked is
the need for documentation. What is important about documentation is that it makes it easier to maintain or upgrade the software. Even if only one developer is working on the project, in the future, it may be necessary to make changes to the program to maintain or upgrade it. So, it is important for others to be able to understand how the code works. This can mean putting clear comments in the code for a smaller project, or for a larger project, it can mean producing clear documentation. It may also be necessary to provide documentation for the end users of the software and this is also something which needs to be done. Another important stage in the SDLC is testing
to make sure that the software functions in the way it is designed to. There are different levels of testing. Automated testing is often used to test at code level for security issues and also for compatibility issues. Types of testing are getting more and more sophisticated and more effective. However, testing may also need to be carried out by the developers to check functionality and the look and feel of the product. Performance testing may also be carried out, to check how well the product performs under different conditions. For example, software may be tested to make sure that it can cope with very large numbers of simultaneous users. In almost all cases, testing will be an ongoing process, though it may be concentrated in some time periods more than others.
G Set for individual work and pairwork checking.
Closure
Put students in groups. Encourage them to think of different types of large software development projects, which would use the waterfall method. You could refer them to the example of TAURUS, the UK Stock Exchange project. Students think of examples of large software projects in their own country (banking, aviation, manufacturing, healthcare).
Ask students to suggest to what extent the changes listed below would affect the effectiveness of a project plan developed in this way. You could suggest dividing them into three categories: not much effect, a considerable effect, an enormous effect.
Changes in programming tools available: • a large number of new requirements for the software • a small number of new requirements for the software
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• major changes in the project management team • minor changes in the software development team
• a merger between the company which requested the work and another major company
• changes in the cost of computer hardware
Encourage students to think of possible changes themselves and the effects that these might have. Share their ideas as a class.
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