A customer asked for your assistance in the design and migration of their existing storage to a new VNX system. The customer provided the graphical data from their performance monitoring tool…

A customer asked for your assistance in the design and migration of their existing storage to a new VNX system. The customer provided the graphical data from their performance monitoring tool showing data IOPs for the server. The monitoring tool uses iostat which gathers data every 15 minutes. Which primary factor should be explained to the customer when requesting alternate performance data?