CS403 Database Management System VU Assignment No 1 Fall semester 3rd November 2012

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CS403 Database Management System VU Assignment No 1 Fall semester 3rd November 2012



Assignment
Introduction

In this course we are going to develop a complete physical database for “Trade Management System” that will computerize all the necessary Trade Management processes for a small business shop, BEST Mart. For this we will divide this whole project in small 4 to 5 assignment chunks and will try to cover every phase of database development life cycle from scratch to execution. Scenario for the Trade Management System is given below.
There exists a BEST Mart- a shopping centre, whose owner wants to computerize his business by developing Trade Management System. For this, owner hires a Database Administrator and put up a real world scenario and requirements as given below:
Trade Management System permits users to proficiently initiate and evaluate the process of requirement for the BEST Mart. Procedure begins when a client comes to BEST Mart, selects the cart and place the things in cart and goes towards salesman. The salesman examines the code of each selected item. On entry system will display invoice with some details like name of the product, its related magnitude/quantity and total sales line items along with total bill. After placing order, client will ahead to accountant counter to pay bill.
Trade Management System will support both types of customers, Registered and Non-Register. For Registered customers it is necessary for system to check whether he/she is on credit bases or not. For non-registered customers, it must have to be registered only by
©Virtual University of Pakistan 2
the Owner of the BEST Mart. Information about number of creditors and debtors are
known by the accounts department.
System will show flexibility in a sense that it should accept all payment methods i.e.
cash, credit and cash with credit.
Same is the scenario with Administrator/Owner of BEST Mart to purchase items from
different vendors on cash, credit or combination of two. The stock department and Sale
department will need to generate reports about stock status sale in different time span.
Task Description:
This Assignment is starting phase and in this assignment you will focus only on the
tasks given below:
1. You are required to identify all the processes in the system.
2. You are required to mention all the data stores in which data is stored.
3. Find out all the external entities interacting with the system
4. Create a Context level DFD
5. Create a level zero DFD
6. Create a detailed DFD of every process if needed
You have to perform all these steps give above in your solution file.


Note:
Use all concepts you have studied so far and techniques discussed particularly
in lecture 5 and 6 regarding this assignment.
Drawing Final Data Flow Model:
You can use any tool for drawing like MS Office or Visio.
Important things to consider:
1. As happens in real world that everyone visualize a problem in different way so the
solutions of all students should be according to their own thinking not taken from
some source.
2. As this is preliminary phase of our system so it is recommended that you identify
as much processes and their relationships as you can (some of them may be
eliminated in coming assignments).

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[Vuhelper]

Idea Solution

We have to identify External Entities, which I think are:-
Customer
Sales Person of Best Mart
Shop Owner
Accountant
Databases are:-
Items/ Product Info
Customer Accounts
Another thing we missed are:
The Data Storage will contain following:
1. Item Master
2. Customer Master
3. User Master (this way I will create type which will tell me user types, such as
salesman, owners, administrator etc.
4. Vendor Master
5. Sales Data
Remember at the end of line it ask for the report generation, which is only
possible if you have sales data table where you will store the sales information.
Here are samples of context level of dfd. and 0 level dfd
Please make changes and made it as u understand it.