Software Requirement and Design (Group 2)

DFP5043 – Software Requirement and Design

Group 2

Huzaifah, Muiz, Hakim, Amirul, Fitri, Afiq, Alif, Ahmad Luqman

Tutorial Lab3

Instruction:

Discuss and contribute together to answer each of the questions below and post the answer to the class blog.

1. Giving reasons for your answer based on the type of system being developed, suggest the most appropriate generic software process model that might be used as a basis for managing the development of the following systems:

• A system to control anti-lock braking in a car

• A virtual reality system to support software maintenance

• A university accounting system that replaces an existing system

• An interactive travel planning system that helps users plan journeys with the lowest environmental impact

a)     Anti-lock braking system is the system that need a lot of testing and the flow would likely to go back and forth which make Waterfall model out of the question the only reasonable model used would be incremental development.

b)     Virtual reality system is another system that will change based on customer feedback. Incremental development with an agile process may be used.

c)     University accounting system is a system where it’s commonly being used in other industry and would likely already have a model that can be modified to customer needs. Therefore, a reuse-based model can easily be implemented in this system.

d)     Interactive travel planning system is a system that changes based on user feedback and probably would have to extend their compatibility with another system in the future, there’s also a need of usability engineering which is based on user experience and the ergonomics of the design would also affect the end user efficiency, these changes need to be improved overtime so an incremental development approach is the most suitable to give out the best of the system.

2. Consider the reuse-based process model shown in page 14 in the slide, explain why it is essential to have two separate requirements engineering activities in the process.

In a reuse based process, you need two requirements engineering activities because it is essential to adapt the system requirements according to the capabilities of the system to be reused. These activities are:

a)      An initial activity where you understand the function of the system and set out broad requirements for what the system should do. These should be expressed in sufficient detail that you can use them as a basis for deciding of a system that satisfies some of the requirements and so can be reused.

b)      Once systems/components have been selected, you need a more detailed requirements engineering activity to check that the features of the reused software meet the business needs and to identify changes and additions that are required.

3. Based on page 18 in the slide, suggest why it is important to make a distinction between developing the user requirements and developing system requirements in the requirements

Engineering process.

·         The user requirement are intended to describe the system’s function and features from a user perspective and it is essential that user understand these requirement. They should be expressed in natural language and may not be expressed in great detail, to allow some implementation flexibility. The people involved in the process must be able to understand the user’s environment and application domain.

·         The system requirement are much more detailed than the user requirements and are intended to be a precise specification of the system that may be part of a system contract. They may also be used in situation where development is outsourced and the development team need a complete specification of what should be develop. The system requirement are develop after user requirement are developed after user requirement are developed after user requirement have been established.