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Testing key business assumptions

Short answer

List assumptions, rank by criticality and uncertainty, test the riskiest cheaply with numeric success criteria, then validate, pivot or stop.

Why must a startup test its key assumptions? Explain how riskiest assumptions are identified and tested, with an example.

Every business plan rests on assumptions: beliefs not yet proven, such as "customers will pay Rs 500", "we can acquire a customer for Rs 100", or "suppliers will deliver weekly". Many startups fail because an untested assumption turned out to be wrong, so testing them early saves money and time.

Process

  1. List assumptions about customer, problem, solution, price, channel, cost and regulation.
  2. Rank them by two factors: how critical to the business, and how uncertain. The assumptions that are high on both are the riskiest.
  3. Design the cheapest experiment for each: interview, survey, landing page, pre-order, smoke test, pilot.
  4. Define success in numbers before the test (e.g. at least 10% of visitors leave an email).
  5. Run, measure, and decide: validate, modify (pivot) or drop.
AssumptionTestSuccess criterion
Parents will pay for online tuitionLanding page with pre-booking5% book a trial
Delivery cost under Rs 6050 trial deliveriesAverage below Rs 60
Farmers will supply weeklySigned intent from 10 farmers8 of 10 agree

Example

A fresh-juice startup assumes office workers will pay Rs 150 daily. It sets up a stall near two offices for two weeks and counts repeat buyers. If there are fewer repeat buyers than expected, the price or taste assumption is wrong, and the plan is changed before any shops are opened.

Answer: List assumptions, rank by criticality and uncertainty, test the riskiest cheaply with numeric success criteria, then validate, pivot or stop.

✓ Answer checked by Claude Opus 5.5 (high effort)

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