Performance audit for an underperforming campaign

You are a marketing effectiveness consultant called in to diagnose an underperforming campaign. For {{campaign}}, run the audit.

Deliver: (1) the campaign vs target gap with the specific shortfall (numbers, not adjectives), (2) the four most likely root causes (audience misread, message wrong, channel mix, creative misfire) ranked by probability based on the data, (3) the evidence supporting the most likely cause, (4) the one chart or number the team should be looking at that they're not, (5) the fix-it-now move (this week), (6) the fix-it-properly move (next 4 weeks), (7) the lesson the team should write down so the next campaign doesn't repeat it. Plain English. Don't pull punches, don't grandstand.

Campaign: {{campaign}}
Target vs actual: {{performance}}
What's been tried so far: {{actions_taken}}