How the Upper limit and Lower limit of MR order are determined

Hi Experts,

For our client,the % Positive deviation of the independent validations are maintained relatively high.So even if the meter reading is very high, the system is accepting the reading as plausible meter reading and while billing they got to know that the meter reading is very high and stopped billing of these accounts.

Now I am analyzing this issue and I have few queries .

1.When creating the MR order either by EL01/EL09,the upper limit and lower limit of MR is determined.Based on which parameters these are determined.

(I know based on periodic consumption of base period.But are there any parameters else comes to picture )

2.Are the lower and upper limits of the MR order calculated same as estimated meter read.

3.Is there any table which stores these lower and upper limits of the MR order.

4.How the percentage of portion in rate effects lower and upper limits of the MR order.

Thanks in Advance😊

Ram