Where a plan stops short
Three things stop a finished plan reaching a sales call, and each one happens in the week the work is handed over. Each is settled by an agreement between your marketing and sales leadership before a message is written.
The list nobody agreed
Marketing picks an account list and sales never signs it, so the first objection kills the campaign. Agree the sectors, the seat bands, and the named accounts with your sales leadership before a single message is written.
One message for everyone
Your IT director, the person who signs the budget, and the security lead each buy for a different reason. One message written for the company reaches all three and answers none of them, so the evaluation stalls.
No route to a reply
A plan can name the buyer and the message and still leave nobody to run the outreach. Name who sends the first message, who answers the reply, and what happens in the two days after a buyer raises a hand.