First, It looks like each of those case structures are identical. So instead of having 8 of them, it would have been better to turn one of them into a subVI with a string input, and 2 numeric outputs, and use that subVI in each place you have the case structure.
But of course as you asked you want to also eliminate the huge number of cases. What you really have going on is a lookup table. I would make a couple of arrays. One is a string array containing all of your strings. The other is a 2 column multi row numeric array containing all of your numeric values. Search the string array for your string, it will return and index. Use that index with an index array on the numeric array to return the row. Break out the 2 columns.
Of course put all of this decision making into a subVI.
You may also want to store all of these values in a text file and load the text file in at the beginning of the program to create the arrays. This is one of those things that may be easier to create and edit in Excel and write out to a text file. If you make a mistake or need to change something later, you just edit the text file rather than trying to sort through all of the indices of an array constant within the LabVIEW environment.
I am not sure what you are doing at the top of your loop with all of the insert into arrays. It looks like incomplete code. But Build array would probably be a better choice there.
