Business Analyst case study round: requirements to solution

You are given a business scenario, such as 'a company's order process is slow and error-prone', and asked to analyse it. The interviewer watches a sequence. Adjacent Data Analyst / Data Science Jobs use a similar case shape, so this preparation transfers well between the two tracks.

• Problem understanding: restating the business goal and the impact of the problem.
• Requirements elicitation: what you would ask stakeholders and which questions matter.
• Process analysis: mapping the current state and finding the bottleneck or gap.
• Solution and trade-offs: recommending a change and weighing cost, risk and effort.

The output is a recommendation, but the score comes from how you got the requirements right.

Scenario: 'Orders take too long and errors are frequent. Investigate and recommend.'

Strong approach: The candidate clarifies the goal (reduce cycle time and error rate), asks who the stakeholders are, and maps the current process step by step. They identify where handoffs cause delays and where manual entry causes errors, quantify the impact where possible, and propose a targeted change such as automating a validation step. They weigh implementation cost against benefit and note how they would measure success.

Weak approach: The candidate immediately says 'build a new system' without mapping the process, talking to stakeholders or understanding the root cause. It is a solution in search of a problem, and it ignores cost and feasibility.

The case is a proxy for how you would work with real stakeholders. Business Analyst Jobs at product companies rely on this proxy heavily, since day-to-day work looks much the same.

• Requirements rigour: do you dig for the underlying need, not just the stated want?
• Structure: do you map the current state before proposing a future state?
• Stakeholder awareness: do you consider who is affected and who must buy in?
• Pragmatism: do you weigh cost, risk and feasibility, not just the ideal solution?

Distinguishing a stated want from the real business need is often the clearest signal of a strong BA.

Build a repeatable structure so open scenarios feel manageable.

• Practise a loop: understand the goal, elicit requirements, map the current process, find the gap, recommend, measure.
• Rehearse common scenarios: a slow process, a new system rollout, conflicting stakeholder needs.
• Always separate the stated want from the underlying business need.

Because this round is conversational, rehearse speaking your analysis, not writing it. A free AI voice mock interview on InterviewPrep generates a BA case prompt from your CV and a real job description, then scores your structure, pace and filler words, so your requirements thinking comes across as organised and confident.