"The UX Curve"
The template includes an empty two-dimensional graph area and lines for writing on and briefly describing the reasons for the changes in the curve. The horizontal axis represents the time dimension from the beginning of use to the current moment and the vertical axis represents the intensity of the users’ experience.
Kujala, S., et al. UX Curve: A method for evaluating long-term user experience. Interact. Comput. (2011), doi:10.1016/ j.intcom.2011.06.005