---
title: "Testing key business assumptions"
subject: "Entrepreneurship Development"
chapter: 3
key: "semester_7/entrepreneurship_development:testing-key-assumptions"
source: https://www.bctengineer.com/q/semester_7/entrepreneurship_development/testing-key-assumptions
site: BCT Engineering
---

# Testing key business assumptions

Entrepreneurship Development · Chapter 3: Market Validation

- Asked in: year not given, 5 marks
- Video: [Identifying & testing Riskiest Assumptions](https://www.youtube.com/watch?v=J5m364vka38) — Wadhwani Venture Fastrack Content
- Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_7/entrepreneurship_development/testing-key-assumptions
- Whole chapter: https://www.bctengineer.com/md/semester_7/entrepreneurship_development/chapter-3

## Question

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

## Short answer

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

## Answer

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.

| Assumption | Test | Success criterion |
|---|---|---|
| Parents will pay for online tuition | Landing page with pre-booking | 5% book a trial |
| Delivery cost under Rs 60 | 50 trial deliveries | Average below Rs 60 |
| Farmers will supply weekly | Signed intent from 10 farmers | 8 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.

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. Why must a startup test its key assumptions early?
   A. Most startups fail because an untested assumption was wrong
   B. Because tests are legally required
   C. Because assumptions are always true
   D. To increase the cost of the plan
   Answer: A. Early testing saves money and time by catching wrong beliefs. (Key point: Why test)

2. Riskiest assumptions are those that are:
   A. Low on both
   B. High on both criticality to the business and uncertainty
   C. Easy and proven
   D. Only about pricing
   Answer: B. Critical and uncertain assumptions are riskiest. (Key point: Riskiest assumptions)

3. When should success be defined in numbers?
   A. After seeing the results
   B. Never
   C. Before running the test
   D. Only after launch
   Answer: C. Setting criteria beforehand avoids biased interpretation. (Key point: Success criteria)

4. Which is a cheap way to test whether parents will pay for online tuition?
   A. Building the full platform
   B. Hiring 50 teachers
   C. Renting a large office
   D. A landing page with pre-booking
   Answer: D. A landing page with pre-booking tests demand cheaply. (Key point: Cheapest experiment)

## Related in Entrepreneurship Development

- [Key financial indicators: burn rate and runway](https://www.bctengineer.com/question.md?key=semester_7%2Fentrepreneurship_development%3Aburn-rate-runway-indicators) — Entrepreneurship Development, chapter 6
- [Channels, key resources and key partners](https://www.bctengineer.com/question.md?key=semester_7%2Fentrepreneurship_development%3Abusiness-channels-resources-partners) — Entrepreneurship Development, chapter 4
- [Revenue streams and cost structure](https://www.bctengineer.com/question.md?key=semester_7%2Fentrepreneurship_development%3Arevenue-streams-and-cost) — Entrepreneurship Development, chapter 4
- [Defining market size using TAM, SAM, SOM](https://www.bctengineer.com/question.md?key=semester_7%2Fentrepreneurship_development%3Amarket-size-tam-sam-som) — Entrepreneurship Development, chapter 3
- [Marketing strategies, pricing and credit policy](https://www.bctengineer.com/question.md?key=semester_7%2Fentrepreneurship_development%3Amarketing-strategy-price-credit) — Entrepreneurship Development, chapter 5

## Related in other subjects

- [t-test assumptions; two means small sample](https://www.bctengineer.com/question.md?key=semester_5%2Fprobability_and_statistics%3At-test-assumptions-small-sample-procedure) — Probability and Statistics, chapter 6
- [Testing of DC machines: retardation vs Swinburne's test](https://www.bctengineer.com/question.md?key=semester_4%2Felectrical_machines_i%3Adc-testing-retardation-vs-swinburne) — Electrical Machines I, chapter 4
- [Software bugs and testing techniques](https://www.bctengineer.com/question.md?key=semester_5%2Finstrumentation_ii%3Abug-types-testing) — Instrumentation II, chapter 9, asked 2×
- [Software testing time paradox](https://www.bctengineer.com/question.md?key=semester_5%2Finstrumentation_ii%3Asw-testing-paradox) — Instrumentation II, chapter 9