Your plan should say what would make you change it

Marketing plans usually fail in one of two ways. They're defended long after the market has moved, or they're dropped after one bad month.

Both have the same cause. The plan never said what would change it.

One bet, written properly

Every plan rests on a few bets. Here's one, with its breaking point written in:

The assumption: Operations leads at mid-sized logistics firms will book demos from LinkedIn.

The signal that would prove it wrong: Fewer than half the target demos by the end of month two, with spend on plan.

The review date: The end of month two, whatever the mood in the room.

What we'd do instead: Move the budget to the next channel in the plan, and test a narrower message before spending more.

Four lines for each major bet. That's the whole method.

Why unwritten bets turn into arguments

Plans usually list the activities and leave the beliefs unwritten. The campaigns are on the calendar. The assumptions are in someone's head.

So when results dip, nobody can tell whether an assumption has broken or it's a slow few weeks. The decision goes to whoever is most senior, most anxious or most certain. Sometimes that's a founder reacting to their own urgency rather than the problem's. Sometimes it's a team defending a plan because changing it would feel like admitting a mistake.

Either way, the plan isn't deciding anything. People are.

The plan nobody could change

One plan I worked on looked solid: a target segment, a channel mix, a quarterly budget and a six-month timeline. What nobody had written down was what would make them stop.

By month two, LinkedIn was producing activity but very few conversations with the customers they wanted. The marketer thought the audience needed more time. The founder thought the messaging was wrong. Sales wanted to move the budget. Every conversation became an argument about interpretation, so they kept going. More content, more ads, more budget into the same channel. By the time they changed direction, the decision was mostly a justification for having stayed so long.

The next quarter, we wrote the four lines for every bet before anything launched. A weak result no longer meant someone had to convince everyone the plan was wrong. They could point to the rule they'd already agreed and change course without a debate about who had been right.

Review on a date, not a mood

Between reviews, change the plan for only two reasons: a written breaking point is hit, or something outside the plan changes, like funding, a lost key customer or a new regulation.

Everything else waits for the review. That's what lets a team commit to the plan without pretending it can't be wrong. It's the same discipline as deciding what would change your mind before an early test, applied to the plan you're already running.

Before your next plan launches, write the four lines for each major bet and put the first review date in the calendar.