Requirement Specification Document Web Hosting Company Application Management

4.2.1 External machine interfaces

4.2.2 External system interfaces

None

4.2.3 Human interface

Interface requirements include ability to view graphics. The human interface is a design that has all control fields on the user screen. The interface comprises of simple and easy to use input mechanisms, where the user will be able to make or input choices easily and submit the input. The output is then displayed in a user friendly format to all users. Workstation requirements include monitor, keyboard and mouse.

5.0 Behavioral Model and Description

The description of the behavior of the software is given below.

5.1 Description of software behavior

The software will behave differently in different scenarios for each user – manager, employee, and customer.  It displays a different interface for each of these types of users.

5.1.1 Events

An event causes the system to change from one state to another. There are three actors that can generate an event - customers, employees and administrator. The following are events generated:

Customer:

·            Log in/ Log out to/from the system

·            View their profile information

·            Make an order

·            Make a payment

·            View all order information

Employees:

·            Log in/ Log out to/from the system

·            View their profile information

·            View all order

·            View all customer information

·            View all payment information

·      Update customer/order information

·      Delete customer/order information

·      Add new customers

·      View the log file

Manager:

·         Log in/ Log out to/from the system

·         View their profile information

·         View all order

·         View all customer information

·         View all payment information

·         View all employee information

·         Update customer/order information

·         Delete customer/order information

·         Add new customers

·         View the log file

5.1.2 States

A list of states that is a result of the above events is given below:

                                                Table 4: Event-State

5.2 State chart diagram

This diagram depicts the overall behavior of the system 

6.0 Restrictions, Limitations and Constraints

Following are the evaluated constraints:

1.      Orders can be edited/deleted only by the employee/manager once they have been placed.

2.      Multiple employees cannot process/edit data simultaneously

3.      Trade-off between system optimization and data processing speed.

7.0 Validation Criteria

The approach to software validation/verification is described in the table below along with the expected results and performance bounds.

7.1 Classes of tests

Table 5: Test Criteria