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LIFT - USE CASE

Name: Request for Lift

Actors: Passenger

Goal: Movement of passenger to move to different floors

Reference to requirements:

Pre-conditions:

1. The Lift is fully functional.

Description:

1. Passenger goes near the Lift buttons present in the particular floor.

2. Passenger presses the buttons for going to the requested floor.

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3. The Lift checks whether it is in the current floor in which the passenger

intends to go or it is below / above the requested floor.

4. If the Lift is already in the requested floor it does no movement. Else if the

Lift is below or above the requested floor it MOVEMENT OF

LIft to reach the requested floor.

5. The Lift opens the door and senses using sensor if any movement is there in

the door.

6. If the passenger inside presses button and lift senses no movement in the

door. Then the system closes the door.

7. Then the lift MOVEMENT OF LIFT to reach the requested floor.

8. Then the lift opens the door and displays the current floor.

Post-conditions:

1. The passenger reaches the requested floor and lift closes the door on sensing

using sensor no activity near door and remains on the current floor until next

requests.

Exceptions:

1. Some other passenger in some floor requests for lift.

The Lift checks if the other passenger asking services is in between

the current and requested floor, also the other passenger requests the

direction in the same direction as the inside passenger. Then the Lift

stops and opens in the other passenger floor. Else lift does not stops.

Power Failure it connects to auxiliary power supply.

Malfunctioning of Lift the Lift give Alarm.

Name: Maintenance Status And Response

Actors: Maintenance Engineer

Goal: Maintenance of Lift

Reference to requirements:

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Pre-conditions:

1. Power Supply is available to Lift.

Description:

1. The Maintenance engineer checks the display in Lift and in respective floors

display are correct working.

2. The Maintenance engineer presses different movement buttons and the Lift

will > MOVEMENT OF LIFT to different floors and requested by

the Maintenance Engineer.

3. Maintenance Engineer checks on Lift Health conditions.

4. If any problem of Lift Maintenance Engineer, he does the maintenance.

Post-conditions:

1. The Lift is in good working conditions.

Exceptions:

Power supply failure:

The Lift connects to auxiliary power supply.

Name: FIRE ALARM

Actors: Safety engineer / Fire Condition

Goal: Alarm on fire condition

References to requirements:

Pre-conditions: Fire sensor is working correctly

Description:

1. When there is a fire condition the Lift senses the fire and Alarms.

2. The maintenance engineer also checks the Alarm by setting the condition the

Alarms condition.

3. After Alarm the Lift goes to the ground floor and opens the door.

Post-conditions: The lift stays in ground floor.

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Exceptions:

power supply failure :

The lift connects to auxiliary power supply.

Name: Movement of lift

Actors:power cut /request for lift/ fire condition

Goal: movement of Lift.

Reference to requirements:

Pre-conditions:

1. Power supply is available.

Description:

1. Whenever there is a request of lift my passenger then the lift moves to the

requested floor.

2. When there is a fire condition the lift moves to ground floor.

3. On power cut the lift connects to auxiliary power supply and move to

nearest floor.

Post-conditions:

1. Lift is moved

Exceptions:

1. power supply cut.

The Lift is connected to auxiliary power supply.

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LIFT REQUIREMENTS

TABLE OF CONTENTS1. Introduction

1.1 Purpose

1.2 Scope

1.3 System Description

2.Functional Requirements

3.Interface Requirements3.1 User Interface

3.2 Hardware Interface

3.3 Software Interface

4.Operational requirements

4.1 Safety

4.2 Security4.3 Reliability