8fcb62ec_rics___Introduction___FT_Press__Considerations
[0] 2.7 [Metric] Purchase Intentions [Construction] Probability of intention to purchase. [Purpose] Measures pre-shopping disposition to purchase. [Considerations] 
To estimate probability of purchase, aggregate and analyze ratings of stated intentions (for example, top two boxes).
Marketing Metrics: Understanding Market Share and Related Metrics | Introduction | FT Press
Considerations