Dashboard filter with manual values

What is the problem or goal the end user is trying to solve or accomplish?

Users would like to be able to create ad hoc dashboard filters that aren't powered by datasets, by manually inputting the available options.

How are they solving it currently?

They currently have to create a virtual dataset with the options they want.

What is the recommended solution by the Customer?

Provide the ability to create a dashboard filter and manually input the options.