Reference no: EM133042300

Task:

SYSTEMS DEVELOPMENT

1. Critically discuss and select appropriate systems development process models to address a range of typical systems development problems.

2. Select and apply appropriately from a range of tools and techniques used in the various stages of systems development.

Question 1.

Access to financing is vital for the growth of the agriculture sector in Ghana, mainly for working capital such as acquiring inputs (seedlings, farm fertilizer) and for hiring labour, as well as for fixed capital acquisition such as machinery. The absence of financing limits the average acreage of cultivated farmlands and thereby, impedes agricultural growth with consequences for the macro economy as a whole. In Ghana the financial sector players involved in agricultural financing include banks, rural banks, Savings and Loans Companies and Microfinance institutions.

To support Agribusiness activities through the country, a new Agricultural development bank is being setup to boost the agricultural sectors that needs financial support. The Agricultural development Bank is to has regional branches across the 16 regions of Ghana and other subbranches across the municipal and districts. All the Branches of the Bank needs to be integrated and the Head Office is in Accra. The Bank requested software to manage their business transactions.

(a) As the software project manager at the new bank, provide a formalized banking system's Object Model and an instance diagram of the model with the following:

1. The head office coordinates transactions and management activities of the all the branches

2. Transactions involving credit and debit of accounts are done at all branches

3. The types of accounts at the bank owned by customers are savings and current accounts.

NB: Attributes should be determined by the student and modelling tools are required. Explain the Banking Object Model drawn and justify why models can assist the analysis/design process of the system

(b) Provide a Use Case diagram for the Object Model banking system in question

(a) above. Explain the Use Case and justify why Use Cases can be used to document system requirements.

(c) Provide a Sequence diagram, performed on a per Use Case basis for question (b), examine the flow of method calls within the system.

Question 2.

The Agricultural development Bank have decided to add an investment section to its banking activities. They decided to make stocks available for online trading. There is a need of a systems analyst and developer to help in modelling of the system.

Assuming you are the head at the head of system's development unit within a software company leading and managing the system development project, use the following information to provide solution to the system.

The system to be developed should have an asset trading system that will engage investors and brokers online to trade by accessing the stock market.

The system must have the below requirements:

An investor through a graphical interface with an account can access the services of a broker. The investor needs to first have portfolio with an asset or assets. The broker then trades with the investor and accesses a list of databases and stock markets.

NB: Attributes should be determined by the student and modelling tools are required. A software company has been contacted to help design and build the system.

(a) As the software project manager at the contracted software company, provide a formalized investment system's Object Model and an instance diagram of the model with the following:

- An investor can only engage a broker at a time

- A stock market should be accessible by the investor and the broker via the trading asset system

- An investor can have many portfolios and assets

- The asset trading system should be accessible via a GUI and APIs for external users.

Draw a System Object Model for the situation above and explain the Object Model drawn. Justify why the object model can assist the analysis/design process of the system

(b) Provide a Use Case diagram for the Object Model question (a) above. Explain the Use Case and justify why Use Cases can be used to document system requirements.

(c) Provide a Sequence diagram, performed on a per Use Case basis for question (b) and examine the flow of method calls within the system.

(d) Provide a class diagram for the object model in (a) show the relation and association between the classes. Discuss 2 advantages of using class diagrams to document software with justifications as an OO CASE tool.

(e) Provide an object UML diagram based on the above UML class in (d) and explain the diagram. Explain using this example why UML is a good OO CASE tool for this example.

Question 3

Requirements are the "blueprints" that everyone involved on the project uses to work from. Systems development process models play very significance role in the building of information systems. However, challenges with project teams in selecting appropriate models can affect the entire project.

Critically discuss why poor documentation of system requirements and poor selection of appropriate systems development process models is a challenge in systems development.