The Fast Stream case study assessment: a method that works
The case study assessment puts you in an imaginary role on a project that keeps moving. You read 7 pieces of background information, then respond to 24 situations as the scenario evolves. Candidates who score well treat it like a real assignment: they read the file properly, keep track of what changes and judge every response against the facts.
What the official page says
- The test assesses your decision-making and your ability to adapt to changing circumstances.
- You take on an imaginary role, review background information and respond to a series of challenges.
- It is an evolving scenario: 7 pieces of background information, followed by 24 situations.
- In some situations you identify the most and least effective responses.
- In others you rate the effectiveness of several possible actions: Counterproductive, Ineffective, Partially effective or Effective.
Source: the Online tests page on Civil Service Careers. The test is untimed; the official assessment guide puts both online tests at around one and a half hours in total.
Before the first situation: read the whole file
Give the 7 documents your full attention before you answer anything. As you read, build a short note with:
- the objective of the project and how success is measured
- deadlines, budgets and the figures in any table
- who decides what, and who must be consulted
- each stakeholder's position and concerns
- risks and constraints the documents state plainly
Most keys in a case study turn on one of these facts. A response that looks reasonable in isolation is often wrong because it ignores a deadline, a budget limit or a decision that belongs to someone else.
As the scenario evolves
New situations bring new information: a delay, a complaint, a change of priority, fresh data. Update your note each time and check whether an earlier fact still holds. The test measures your ability to adapt, so the best response to situation 18 may differ from what was right at situation 3.
Most and least effective
When you choose the best and worst response, you only need two decisions. A reliable approach:
- Find the response that acts on the evidence in the documents and involves the people who own the decision. That is usually the most effective.
- Find the response that ignores a stated risk or constraint, hides a problem or goes beyond your role. That is usually the least effective.
- Ignore the middle options once those two are clear: they carry no points of their own.
Rating situations
The rating situations use the same four labels as the work-based scenarios. Rate each action on its own and reward proportion: a sensible step that is slow or partial is Partially effective, while an action that solves today's problem by creating a new risk drops to Ineffective or Counterproductive.
The behaviour at the centre: making effective decisions
GOV.UK defines making effective decisions as using evidence and knowledge to support accurate, expert decisions and advice, and carefully considering alternative options, implications and risks. Its published examples include analysing and using a range of relevant, credible information to support decisions, and presenting strong recommendations in a timely manner, outlining other options, costs, benefits and risks. That is exactly what a high-scoring case study answer does.
Practise at full length
Reading 7 documents and holding 24 situations in your head is a skill of its own, and it improves fastest at full length. Every CivilPrep full mock ends with a case study in the official shape, with 7 background documents and 24 situations, and the course adds shorter practice case studies for focused sessions. Try the format in the free practice test.