Thanks Dave,
I have this package with me , I can see there is one JS activity which has all the variable and the values are hard coded in it , I would like to set these values by calculating the avg time taken by the deliveries in campaign instance , is this the good idea ? as of now I m queering delivery schema and getting the contact date as start date and last modified date as end date , now I take hours of these two and subtract them each and them ill sum all the hours and take out avg of all them , that I am considering as avg time taken by deliveries for that instance .
Is it good idea ? or any other approach can be considered .