Reference no: EM132882683 , Length: word count:1700

HS2011 Systems Analysis & Design - Holmes Institute

Current System Analysis and Modelling

Purpose: The aim of this assignment is to produce a requirements document that captures the functional requirements for an information system that supports the current needs of Allure investment as defined later in the Case Study Description.

This is a business report and should be written accordingly i.e. directed to the customer who is "Allure investment". It should reflect your understanding of the tasks required.

Students will be able to:

1. Explain and apply systems analysis and design concepts, principles, methodologies and tools to analyse, design and implement business solutions.
2. Explain and apply process modelling, logical and data modelling tools in the development of information systems
3. Explain and evaluate system implementation and post implementation systems requirements
4. Analyse business scenarios to generate requirement specifications and design possible solutions to satisfy business requirements.
5. Apply problem solving and object oriented design skills to build a simple systems prototype

Your tasks

Read the case carefully and if students need more detail either about the business or the assignment, they should talk to the lecturer or tutors, preferably before starting the task during the tutorial classes or go to the scheduled consultation time or email to make an appointment if necessary.

This assignment will require you to complete Milestone 1 - problem analysis, which includes understanding business in general, their challenges, current system issues/problems, essential functional/non-functional requirements and limitations. Milestone 2 - Data Modelling which uses some of the models of a Structured Approach, such as Event table, Data fragments, a context diagram, DFDs, ERD and DFD documentation to illustrate the current system.

Milestone 1: The Report Components

Create a business report with:

Cover Page

• Document Title
• Author(s) information

Table of Contents
• You have to use Microsoft Word build-in function when creating a Table of Contents.

Executive Summary
• What this assignment is about and what you want to achieve (the Executive Summary is different to Introduction and must be about 100 words in length).

Introduction

• Why conduct system analysis and design for a business?
• BA role, the business and IS analysts need to have a "big picture" view of any business and their information systems. You are required to list the major responsibilities which you should take on to help the business. What is your basic plan, where you start, what you do and what you want to achieve?
• The purpose of your work
• The structure of your report
• Where did you collect data and information for completing the report?

Company/Business Background

• What is the business, and what does this business do? (A brief description of their current business operation, products and services. Please notes that you should read the case description, understand it

and provide a summary. You shouldn't copy the case description which we provide directly to your report. Max, 100 words.)
• What are some of the challenges the business (internal and external) currently facing and how they impact on overall business future development?
• In your opinion, what are the three major problems which you consider are the most important for the business and explain why they are important. What are some of the opportunities when these problems are solved? How would the organisation be better off by solving this problem or taking up this opportunity? You are welcome to add on problems/issues which not currently listed, but which you consider are essential to address. You should provide reasoning.
• Clearly explain the current system's objectives and constraints. Please note: you need to read the case description to understand what the current system does.

Scope (Current System)

• A written statement of functional/non-functional requirements (you are required to list them all with a brief explanation for each of them).
• Discuss the techniques of identifying the use cases.

Documentation

• Data dictionary
o Complete TWO (2) key Data flow descriptions (Logical data dictionaries)
o Data element descriptions (Physical data dictionaries, at least 1 of the key data entities)
• Process Descriptions
o A brief description for each of the key processes (top level processes in level 0 DFD) written in plain English
o Write at least ONE lower level process description in structured English
Appendices (Ensure your pages are numbered for easy reference) You should include the following information in appendices:
• Events table, DFD fragments, context diagram, levels 0 & 1 DFDs and ERD (Please see below modelling requirements for the current system).
• The appendices should also contain any other documents that might be useful for reference or too detailed or lengthy to put into the main part of the document.

Milestone 2: Modelling requirements for the current system

Provide a structured analysis of the functional requirements of the system presented as a set of logical data flow diagrams and prepare a data model represented as an entity-relationship diagram for the current system.
The set of data flow diagrams should include:

• Identify 5 to 6 key events, please notes that:
o for each key function, you must have at least one event link to it;
o ‘cancellation' or ‘updating' related events shouldn't be included in your list of events;
o You should have at least one state, and one temporal event is included in your list of events.
• You should create an event table to list all these identified events, and each event should be matched with a DFD Fragment.
• A Context Diagram: This must be for the entire Allure investment. You need to show relevant external agents together with data flows between the system and the external agents.
• A set of levelled data flow diagrams which includes:
o Level 0 DFD which includes all top-level processes, key data stores, key data flows and key external entities.
o At least 1 top-level process from this Level 0 DFD is decomposed to level 1 DFD.
• An Entity Relationship Diagram (ERD): It should be a high-level data model (many to many relationships is acceptable in this unit).

You will be assessed on your application of data flow diagrams according to the following criteria:
o DFD syntax
o DFD data conservation (also commonly known as "balancing" or data consistency in some textbooks)
o Quality of names
o Logical, not physical
o Quality of modelling is more important than quantity
Consistency - not only should each view (data flow, process, data store) be accurate and readable, but also the views must be consistent with each other, so the whole analysis makes sense.
Preferably, diagrams should be generated by using Visio Pro or other virtual tools but students may use the drawing capabilities of other packages.

Attachment:- Current System Analysis and Modelling.rar