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Real-World Excel Project 7: Factory defect monitor
Scenario
You are a data analyst. A parts factory has a problem: some production lines make more faulty parts. As a quality control analyst, you are tasked to build a defect monitor with a slicer per line. Sheet: column A = run_id, B = line, C = units.
Question
Write the formula in the editor, press Check my answer, then explore the dashboard to answer the client's problem.
Your task
- Read the client's problem
- Press Check my answer
- Use the filter to find the group that needs attention
- Your project is saved and published to your portfolio
Advanced · COUNTIF & SUMIF — question 10 of 30
1. Choose your dataset
Pick an industry and a size. Your code and results change to match.
💡 Explain my whole code, line by line (hover any word in the editor for a tip)
🌈 In short — no coding words
Altogether: this formula looks at the cells you named and works out one answer.
Dataset & schema
machine_runs
The tiny starter data. Bigger data scrolls.
Fields
| A: run_id | B: line | C: units |
|---|---|---|
| R1 | LineA | 120 |
| R2 | LineB | 80 |
| R3 | LineA | 150 |
| R4 | LineC | 60 |
Manufacturing data only. No other industry's data is used.
$ Press “Check my answer” — results appear here.Your next steps
Each item turns green when your answer includes it.
- Uses a dashboard
- Uses the sheet's columns B and C