What about adding input fields to the dashboard widgets. Kind of like the text field but it is enabled for user input. This input field can be used in new column and new measure fields so that once the dashboard is set up the user can easily (without filtering) explore the data by entering different values such as if you had an input box for unit price. Then if you change it all the charts of total sales, revenue, etc. Will update to reflect what would happen if you increase the price by 10%. This will enable people to quickly and easily interrogate the data