Hi Mihir,
The actual range of coverage will tell you how many days of the following months you can cover:
Actual range of coverage
The actual range of coverage states the number of days the available quantity of a material in the periods displayed can cover the requirements in the periods that follow.
As you can see in MD04, the remaining quantity in Nov is 120 CS (so even when the last order that you have in Nov is from Nov 21st, you know that on Nov 30th, the remaining quantity is still 120 CS).
So considering that on Nov 30th, the stock is 120CS, and you get into a shortfall on Dec 12nd, you know that you can cover 12 days. The number is 12.8, because 120 CS / 150 CS = 0.8. This means that you can cover 12 days and the 80% of the PIR that you have on Dec 12nd.
Kind Regards,
Mariano