Response time

When designing VUIs, the response time is a very important factor. A slow response time can jeopardize the user experience and the quality of the application. Note that here is a set limitation for Alexa and Google on how long the response time should be. For Alexa, the response must be received within 8 seconds, and for Google, the response must be received within 5 seconds. If the response from the backend server does not arrive within the given limit, Alexa and Google will send an exception back to the server. Consider factors that can affect responding to the user's intent, as follows:

• Slow internet speed, which can cause delays for the users in terms of sending their verbal intent and receiving the response from the server
• Slow backend server and database can cause slow latency issues when sending the instruction back to the application which in turn delays the responds sent to the users