As a solution architect, you are in a meeting about the design of a new application to manage the delivery process of goods or services. The extension will be maintained by the line of business (as opposed to IT).
The following application parameters/features are discussed:
Tracking deliveries in real-time

Optimizing delivery routes -
Providing delivery notifications to customers.

Scaling according to usage -
Maintenance downtime must be short.
Which extension type is best suited for this application?