Question

what is the summary of chapter 3 in  "To Engineer is Human" by Henry Petroski

what is the summary of chapter 4 in  "To Engineer is Human" by Henry Petroski

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Answer 1

Answer-

The Summary of Chapter 3 ( Lessons from play, lessons from life ) in  "To Engineer is Human" by Henry Petroski is-

1- Fatigue can't be predicted precisely.

2- Results of failure leads to consumer expectations for a given device

3- Engineers chief task is to find out 'How long will it take before simple gradation of its material threaten the structures life'.

The summary of Chapter 4 ( Engineering as hypothesis ) in 'To Engineer is Human by Henry Petroski is-

1- You can conclude to an answer which is qualitatively correct but cannot be absolutely correct quantitatively.

2- The designed structure will not fail If it is used as intended, This is the fundamental feature of all engineering hypothesis.

3- Scientific method is used in engineering development.

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