You want your application to respond immediately as your end users interact with customers. As you design your user interface, determine:

1. Which business service level agreements exist. For example, the customer details must be available in one second or less while a representative is on the phone with the customer.
2. How long it takes backend systems to gather the data needed to display customer details.
3. Which fields the representatives absolutely need for the task that they need to perform.
4. If any network configuration could cause latency, for example, if there are representatives logged in through a corporate VPN or in a remote location.