What is What-If Analysis?

S8-SA5-0177

Grade Level:

Class 5

AI/ML, Data Science, Research, Journalism, Law, any domain requiring critical thinking

Definition

What is it?

What-If Analysis is a way of thinking about different possibilities and their outcomes. It helps us predict what might happen if we change certain things in a situation. We ask, 'What if this happens?' and then see what the result would be.

Simple Example

Quick Example

Imagine you want to buy a new cricket bat for ₹1000. You only have ₹800 right now. You can do a What-If Analysis: 'What if I save ₹50 every day?' or 'What if I ask my parents for ₹200?' This helps you see different ways to reach your goal.

Worked Example

Step-by-Step

Let's say your school picnic costs ₹300 per student. You want to invite your 25 classmates.---STEP 1: Calculate the total cost for 25 students. Total cost = 25 students * ₹300/student = ₹7500.---STEP 2: Now, let's do a What-If Analysis. What if only 20 students come?---STEP 3: Calculate the new total cost for 20 students. New total cost = 20 students * ₹300/student = ₹6000.---STEP 4: What if the picnic cost increases to ₹350 per student, and 25 students still come?---STEP 5: Calculate this new total cost. New total cost = 25 students * ₹350/student = ₹8750.---ANSWER: By doing What-If Analysis, we see that the total cost changes from ₹7500 to ₹6000 if fewer students come, and to ₹8750 if the per-student cost increases.

Why It Matters

What-If Analysis is super important for making smart decisions in many fields. Scientists use it to predict climate changes, business owners use it to plan their sales, and even doctors use it to understand how different treatments might affect a patient. It helps people plan better and avoid problems.

Common Mistakes

MISTAKE: Only thinking about one 'what if' scenario and stopping there. | CORRECTION: Explore several different 'what if' possibilities to get a complete picture of potential outcomes.

MISTAKE: Not changing the 'what if' factor enough to see a real difference. | CORRECTION: Make the changes big enough to clearly see how the outcome is affected, or try a range of changes.

MISTAKE: Assuming the 'what if' scenario will definitely happen. | CORRECTION: Remember that What-If Analysis explores possibilities, not certainties. It helps you prepare, but doesn't guarantee the future.

Practice Questions

Try It Yourself

QUESTION: You have ₹500 to buy books. Each book costs ₹100. How many books can you buy? What if the price of each book increases to ₹125? | ANSWER: You can buy 5 books (500/100). If the price increases to ₹125, you can buy 4 books (500/125).

QUESTION: Your favourite mobile game gives you 10 points for every level you complete. You want to reach 500 points. How many levels do you need to complete? What if the game developers change it to 15 points per level? | ANSWER: You need to complete 50 levels (500/10). If it changes to 15 points, you need to complete about 33.33 levels, so 34 levels to reach 500 points.

QUESTION: A samosa costs ₹15 and a chai costs ₹10. You want to buy 3 samosas and 2 chais. What is the total cost? What if the price of samosa goes up by ₹5, and you decide to buy 4 samosas and 1 chai instead? Calculate the new total cost. | ANSWER: Original cost: (3 * ₹15) + (2 * ₹10) = ₹45 + ₹20 = ₹65. New samosa price: ₹15 + ₹5 = ₹20. New total cost: (4 * ₹20) + (1 * ₹10) = ₹80 + ₹10 = ₹90.

MCQ

Quick Quiz

Which of the following best describes What-If Analysis?

Only looking at past events

Predicting the future with 100% accuracy

Exploring different possibilities by changing assumptions

Ignoring all possible problems

The Correct Answer Is:

What-If Analysis is about exploring different possibilities by changing certain factors or assumptions to see how the outcome changes. It doesn't guarantee the future (B) or ignore problems (D), and it's not just about the past (A).

Real World Connection

In the Real World

Many businesses in India, like Zomato or Swiggy, use What-If Analysis. They might ask, 'What if petrol prices increase by ₹10? How will it affect our delivery costs?' or 'What if we offer a 20% discount? How many more orders will we get?' This helps them make smart decisions about pricing and services.

Key Vocabulary

Key Terms

ASSUMPTION: something we believe to be true for the purpose of a calculation, even if it might change | OUTCOME: the result or consequence of an action or event | SCENARIO: a possible situation or sequence of events | PREDICT: to say or estimate what will happen in the future | VARIABLE: a factor that can change or be changed

What's Next

What to Learn Next

Great job learning about What-If Analysis! Next, you can explore 'Decision Trees,' which are a visual way to map out different What-If scenarios and their likely outcomes. This will help you make even more informed choices in complex situations.