shutdown occurred per calendar month starting from 2018

[nagesh]

Using Ticket-number and shutdown date field I need to
determine how many shutdowns occurred
per calendar month from the beginning of
2018 to present run date of report

[jerifortune]

In your load statement include the following;

LOAD
 Ticket_number,
[shutdown date],
Year([shutdown date])    AS Yr,
Date([shutdown date], 'YYYY MMM')   AS YrMonth
......

On a Straight table have, YrMonth as dimension and  this expression as measure
Count({<Yr={">=2018"}>} Ticket_number)

You can also use other charts.

Hope this helps.