Question

please draw a sequence diagram

Basic package: 6 window sensor, 3 door sensor, 1 motion sensor, 1 glass sensor

Basic Plus: 10 window sensor, 4 doors sensor, 2 motion sensor, 2 glass sensor

Elite: 15- window sensor, 6 doors sensor, 3 glass sensor

All packages will also include an alarm system devices of a give package are with the alarm system.

Customers have the option to disable a device. Customers can also armed or disarm the system.

Customers would need to setup a 4 digit pin during initial setup.

They will use the pin to configure the alarm system:

Set a pin/code, enable/disable a device, arm the system, disarm the system.

Each alarm system will maintain an alert history. Any time a device is triggered, an entry will be added to this history. On alert if the system is armed, this will

Answer 1

To design the ERD which also complies with normalization rules in 3NF

The entities are

1)Package Type

• Alarm History
• Customer
• Customer Configuration

2)Relationships

• The initial set up uses a 4 digit pin by which the system is configured with various parameters for which customer entity and customer configuration entity are related as one to one and one to many relationships of cardinalities.
• A customer can avail any one of the packages • Each customer will have a 4 digit pin
• One alarm will have one to many alarm histories.