What an assessment centre is really testing
The exercises are the medium — the message is you at work. Every assessor is scoring against the same 6–8 competencies you saw in the application form. The group case is just a way of watching you demonstrate them under mild pressure.
"By lunchtime we've usually agreed the shortlist. The afternoon is confirmation, not discovery."
Group exercises
The most misunderstood part of the day. Candidates think it's a competition — it isn't. You're being watched for how you make the group succeed.
- In the first two minutes: propose a structure or a timekeeper role. Someone has to.
- Bring in quieter people by name: 'Priya, what do you think about that?'
- Disagree with someone at least once — assessors want to see judgement, not niceness.
- Summarise every 10 minutes. It refocuses the group and shows leadership.
"Talks over everyone for 30 minutes, ignores the shy candidate, restates other people's ideas as their own."
"Proposes structure early, invites two quieter voices in, disagrees once with clear reasoning, summarises before the timer."
Why this works — The 'strong' version demonstrates leadership, teamwork, communication and initiative in one exercise. It'll score across four competencies simultaneously.
Dominating the group. Loudness reads as insecurity to trained assessors, not confidence. The candidate who talks 25% of the time but shifts the group's direction usually wins.
Case study / written exercise
You're given a pack (a business problem, a policy question, a client scenario), 60–90 minutes, and asked to produce a short recommendation. Assessors read for structure, judgement and prioritisation — not brilliance.
- Read the whole pack once, fast. Don't take notes yet.
- Read again, marking only what changes your recommendation.
- Write the recommendation first, then the supporting reasoning. Executive-summary style.
- Leave 10 minutes at the end for a structural read-through.
Presentations
Usually 10 minutes to present, 10 to answer questions. The Q&A is where scores are made or lost. If you present with confidence and crumble when pushed, you'll lose points.
- Three-part structure: recommendation, three reasons, one risk you've considered.
- One slide per point, minimal text, no jargon.
- For Q&A: welcome challenges, buy thinking time ('good question, let me take that in two parts'), never bluff.
The interviews within the day
By this point you're tired. Assessors know — they factor for it. But the interview is where competencies you didn't demonstrate elsewhere get their airtime. Bring the story bank.
Lunch, coffee breaks and networking
You are always being assessed. Not in a paranoid sense — just: the current employees around you are asked what they thought of you. Be curious, ask good questions, and don't complain about the day.
"The candidate who's rude to the receptionist is off the shortlist by 10am, and doesn't know it."
Resetting between exercises
Every candidate has one exercise that goes badly. The difference is the ones who let it colour the rest of the day and the ones who shake it off in the ten-minute break.
Ritualise the reset: bathroom, water, one breath, 'that one's done, next one is fresh'. Assessors don't share scores between exercises.
Common mistakes
- Dominating the group exercise.
- Presenting without a clear recommendation up front.
- Bluffing in Q&A instead of asking to think.
- Being unpolished at lunch or with junior staff.
- Carrying a bad exercise into the next one.