Quality control and measurement

What you'll learn

1. 1

   Imagine you're making 100 identical metal brackets. You check each one with a ruler — if it's too long or too short, it fails.

2. 2

   What does quality control check?

3. 3

   Measure this bracket — drag the ruler to check its length.

4. 4

   A bracket should be 50 mm long. You measure it — it's 49.8 mm. Is it okay if the tolerance is ±0.5 mm?

5. 5

   A part must be 100 mm ±1 mm. What is the smallest length that passes?

6. 6

   Check this part — it should be 30 mm wide with ±0.2 mm tolerance. Move the ruler to see if it passes.

7. 7

   A part is 45.3 mm. Tolerance is ±0.1 mm. Does it pass?