To calculate reach, number and the type of user group is targeted is considered. Weightage is as per the strength of each user type
Usergroup/Reach Weightage
To calculate impact, which motivation drive is invoked by the feature is considered. Weightage to is assigned based on importance of each drive. Due to lack of secondary data, number of responses are considered as proxy for importance i.e. the drive which is selected by maximum number of users depicts the most important drive