Therefore, this is my conclusion:
• in order to target a number of immigrant in a certain year, you have to issue its latest invitations 5-7 months earlier, right? This is the average processing time for an express entry candidate. So, let's say I had already targeted a number of immigrants for 2017, but realized from the number of accepted invitations when I reached the latest month to take an action (April/ May 2017) that I'm far away from my target, what shall I do? Exactly what CIC did, sending enourmous amount of invitations in a short period to catch up with my plan (considering that starting from June, I have to send invitations for people who will arrive in 2018). Then after sending, I have to stop a bit, review my target, evaluate the process of the previous year, give my employees their vacations (because it's summer and they don't really enjoy the weather except in these days) relax and plan for the next year, and make two draws only to fill up missing numbers and get into the new year wisely, because I don't want the same rush that happened in April and May again. This is the summary of June and July.
Now, I'm in August, I will look back to the previous year (which was the first year to have such a big target) and observe the trends to balance the pool throughout the year.