Use a structured top-down approach: estimate the US population, segment by age/household type, and apply replacement cycles and new demand to derive annual mattress sales. Validate with a bottom-up check using retail channels or manufacturer data if possible.
Pro tip: Show your work clearly and round numbers to simplify calculations; interviewers care more about your logic than the exact number. Also, mention that you'd validate your estimate with real-world data sources like industry reports or company financials.
Confirm whether the question refers to mattresses sold for residential use only or includes commercial (hotels, hospitals). Also clarify if it's units sold or revenue.
Start with ~330 million people. Estimate average household size (~2.5) to get ~130 million households. Consider that not all households buy mattresses annually.
Assume mattresses are replaced every 8-10 years, so ~10-12% of households buy a new mattress each year. Add new households formed annually (~1-2 million) and subtract households that don't buy (e.g., renters with furnished apartments).
Multiply households by replacement rate: 130M * 10% = 13M mattresses. Add new household demand: ~1.5M. Adjust for multiple mattresses per household (e.g., guest beds) and commercial demand if included.
Compare with known data: US mattress industry sells ~20-25 million units annually. Adjust assumptions (e.g., replacement cycle, household size) to align with this range.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.