Caliper beam and elevator: what they have in common

1. Step 1. Caliper beam — is part of — Vernier caliper. The main scale.
2. Step 2. Vernier caliper — evolved into — Micrometer. A more precise instrument.
3. Step 3. Micrometer — is used in — Interchangeable parts. Precise measurement ensures interchangeability.
4. Step 4. Interchangeable parts — is used in — Prefabrication. Standard elements.
5. Step 5. Prefabrication — is used in — Panel building. Assembled from panels.
6. Step 6. Panel building — has part — Elevator. Lifts.

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