Planning a conference? Here's everything that can (and will) go wrong, and how to avoid it

Conferences are some of the most rewarding events to work on, and also some of the most unforgiving. More moving parts, more people, more schedule dependencies, and a lot less room to improvise on the day. After years of running these, we've seen pretty much every way a conference can go sideways, so let's talk through the big ones, and how to plan around them.
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The schedule is too tight (and has no breathing room)

This is probably the most common issue. Every session is timed perfectly... assuming every speaker finishes exactly on time, every changeover happens instantly, and nobody runs late from a break. In reality, none of that happens.
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The fix: build buffer time into the programme, especially around changeovers, breaks, and the start of each session block. A 5-10 minute buffer per session might feel "wasteful" on paper, but it's what keeps the whole day from snowballing into chaos by 2pm.

AV issues that derail a session
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A microphone that cuts out, a presentation that won't display properly, a laptop that doesn't connect to the projector, these are small technical hiccups that can completely throw off a speaker and eat into the schedule.The fix: test everything, with every speaker's actual device, before the day. Not "the AV was tested," but "this specific laptop, this specific presentation, on this specific setup." Have a technical contact on site who can troubleshoot immediately, not someone who needs to be called.Better yet, have a dedicated AV technician who receives all presentations beforehand and runs them from front of house. This is the best way to manage a conference with multiple speakers and presentations. Every file is loaded, tested, and ready to go, so there's no fumbling with USB sticks or waiting for someone's laptop to wake up. Speakers walk on stage, the right presentation is already up, and the session moves without a hitch.
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Registration bottlenecks

Nothing sets a bad tone for a conference quite like a queue snaking out the door at 8am because registration can't keep up.
The fix: plan registration capacity for your peak arrival window, not your average. If most people arrive in a 30 minute window before the start, your registration setup needs to handle that volume, not a comfortable trickle.

Catering that doesn't match the days rythm
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Catering timed for "lunch at 1pm" doesn't help if the morning session ran 40 minutes over and everyone's now starving and irritable at 1:40. Equally, a tea station that only appears at scheduled breaks doesn't help delegates who need a coffee at 10am because their flight was at 5am.
The fix: build flexibility into catering timing, and make sure tea/coffee stations are available continuously, not just during formal breaks.

Speakers who aren't briefed properly
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A brilliant speaker with no idea about the room size, time limit, AV setup, or audience can still deliver a session that misses the mark, not because they're not good, but because they weren't set up to succeed.
The fix: send speakers a clear, simple brief well in advance: time allocation, format (panel vs. solo, Q&A or not), audience profile, and technical setup. A quick run through call goes a long way.

No one's thinking abou the "in between" moments
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The sessions themselves often get all the planning attention, but a conference is also made up of arrivals, breaks, networking time, and the close of the day. These moments shape how people feel about the event as much as the content does.
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The fix: give these moments some thought too. A well designed networking break, good signage so people aren't wandering lost, a smooth close that doesn't just fizzle out, these add up to a conference that feels professional from start to finish.

Nobody owns the "what if" plan
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What happens if a speaker cancels last minute? If the venue's AV fails? If numbers are higher than expected and catering runs short? These things don't happen often, but when they do, someone needs to be able to make a fast decision without it becoming a crisis.
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The fix: have a clear point of contact on the day whose job is specifically to handle the unexpected, so the rest of the team can keep things running.

The bigger picture

None of these issues are really about bad luck, they're about planning for reality instead of planning for the ideal version of the day. The good news is that with the right preparation (and the right team on the day), almost all of these are completely avoidable.
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This is, frankly, most of what an experienced events team brings to the table: not just organising the parts, but anticipating where the friction points will be before they happen.
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If you've got a conference on the horizon and want a team that's seen (and solved) all of the above, let's talk about how we can help it run exactly as smoothly as it should.