The Standard Guide for Time-Intensity Evaluation of Sensory Attributes (ASTM E1909) has been reapproved and is now available with the name E1909-13(2017). This standard is developed by the Committee E18.03, who this time decided to leave the text of the document as is.
The purpose of time-intensity measurements is to establish the pattern of development and decline of a particular sensory characteristic under study. T-I evaluations are applicable when measurements at a single time point (an averaging process) are not sufficient to distinguish products that have very different temporal characteristics.