Start by clarifying the scope: global or a specific market, and whether 'bottles opened' includes all consumption channels (home, restaurants, events). Then use a top-down estimation: segment the population by drinking frequency and average bottles per occasion, and validate with a bottom-up check using wine production/sales data.
Pro tip: State your assumptions explicitly and round numbers to make calculations easy; interviewers care more about your structured thinking than the exact number. Also, mention that you'd sanity-check your estimate against known data (e.g., global wine production ~25 billion liters per year) to ensure plausibility.
Ask whether the question refers to global or a specific market, and whether 'bottles opened' includes all occasions (home, dining, events) and all wine types (red, white, sparkling). Confirm if we're estimating per day on average or for a specific day.
Decide between top-down (population segmentation) or bottom-up (wine production/sales data). For a global estimate, top-down is often easier; for a specific market, bottom-up may be more accurate.
Divide the target population into segments based on drinking frequency (e.g., non-drinkers, occasional, regular, heavy) and estimate the proportion in each segment. For each segment, estimate the average number of bottles opened per person per day.
Multiply the population in each segment by the average bottles per person per day, then sum across segments to get the total. Use round numbers for ease and state assumptions clearly.
Compare your estimate to known data (e.g., global wine production ~25 billion liters/year, ~750ml per bottle). If your number is off by an order of magnitude, revisit assumptions and adjust.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.