I’ll take a stab at this, it’s been a few years since I’ve dealt with this topic. Hopefully someone else will jump in and correct any mistakes on my part. I just didn’t want to leave your question hanging. But I don’t think I fully understand the question.

CRVM is the method used to develop the terminal reserve factors. It differentiates vs. other methods (i.e. Net Level). It has nothing to do with mean vs mid-terminal reserves.

Mean Reserves = 1/2 [V(t) + V(t+1) +P]. A Deferred Premium Asset might be necessary to correct for an overstatement in the liability due to the assumption of an annual premium (i.e. if the policy is paying more frequently than annual)

Mid-Terminal Reserves = 1/2 [V(t) + V(t+1)] + 1/2 P{m} where P{m} is the modal Net Premium.

Why one instead of the other? Mean has the DPA. Mid-terminal is simpler in that regard.

Remember how much you paid for this response and treat it accordingly.