Calculated Column/Table Change Dynamically According to Slicer Selection in the Report

josephlim  - You could have a binning measure, with a SWITCH statement, like:

binning measure = 
SWITCH(
  TRUE(),
  [value] <= 5, "0-5",
  [value] <=10, "6-10"
  "11+"
)

I think for step 6, you could have a disconnected parameter table with a row for each rating. Then use that rating column in a new measure with a switch statement, like this:

rating measure = 
SWITCH(
  SELECTEDVALUE('Rating Table'[Rating],
  1, <Calculate the 1 star>
  2, <Calculate the 2 star>
  3, <Calculate the 3 star>
  4, <Calculate the 4 star>
 <Calculate the 5 star>
)

Then in the pie chart, you could add the rating column from the disconnected table, and the rating measure.

Hope this helps,

Nathan