Which scenario describes a challenge to velocity?

The scenario that describes a challenge to velocity is one where delays occur in the response time during real-time data collection and processing. In the given example, clickstream data from a shopping website is intended to be processed swiftly to facilitate personalized recommendations for users while they are actively shopping. When the website experiences heavy traffic, any delay in processing this data can impede the ability to provide timely and relevant recommendations, directly impacting the user experience.

This challenge illustrates the concept of velocity in data processing, which refers to the speed at which data is generated, processed, and analyzed. In this case, delays indicate that the system is struggling to keep up with the speed of incoming data and the expectations of real-time analysis. If the system cannot manage the influx of clickstream data efficiently, it fails to achieve the intended real-time response, demonstrating a bottleneck in velocity.

In contrast, the other scenarios either describe continuous or less time-sensitive data processing (like batch processing of monthly sales data), or they are adequately managed for real-time scenarios without experiencing delays.