Does MineSched support variable processing recovery settings in a schedule?

Does MineSched support variable processing recovery as user parameters for correct calculation of final metal output from the processing plant. My MineSched paramters setting are as below:

  1. Input parameters 
    1. Define Geology - Metal quality as Aggregate 

    2. Define Geology - User Parameters - Initial processing recovery REC is 0.86
    3. Define Geology - User Calculation - Metal_Output = Metal * REC
    4. Set Schedule - Location - Stockpile with parameters with same initial REC = 0.86

    5. Schedule parameters tab with the changed REC at a specific date on start date of year 2038.

  2. Results
    1. REC check = Metal_output / Metal added to Mill

  3. Review
    1. The results make me confused about how to set up correct variable processing recovery parameters to generate correct metal_output results in MineSched.
    2. My double-check of the results convince me that the REC settings in Stockpile will not change even we give a changed REC in schedule parameters tab with date /event.
  4. Seek Help from Geovia MineSched Team.
    1. please help to check if I made mistakes to sestup the variable REC parameters or there is a better way to achieve this objective.