Big Picture, Abstraction, and Divide and Conquer
On this page 5 headings
Start here You need to drive a nail into a wall but have no hammer. Most people give up. An engineer asks, “What does a hammer actually do?” It creates an impact. Now a stone, a heavy book or a shoe heel can all do the job.
Habit 8: Big-picture thinking
You met this in systems thinking. Look at the bird’s-eye view, then come back to the details, and go back and forth between them.
| Type | Question |
|---|---|
| Spatial (space) | What does the whole situation look like from above? |
| Temporal (time) | What has happened, or will happen, over time? |
Lecture example — four years at IIT (Prof. Shiva) On day 1, a new student misses home and hates the food. From the “helicopter”, he can see his whole four years: graduating and receiving his degree on stage. The small daily troubles become easier to bear. The helicopter also shows the bad future (failing, falling behind), so he can correct course now by studying regularly.
Lecture example — mechanical vs aeronautical Wanted aeronautical engineering but got mechanical? A big-picture person sees how closely they are connected (the same science and maths) and can still follow an aeronautics passion as a mechanical engineer.
Habit 9: Abstraction and detailing
| Move | Question to ask | Hammer example |
|---|---|---|
| Abstraction (go up to the principle) | **“Why** does it work?” | A hammer is really an impact (impulse) generator |
| Detailing (come down to a real thing) | **“How** can I create an impact?” | A hammer, a stone, a heavy book… |
Why it helps (Prof. Shiva):
- “What is an alternative to a hammer?” limits your thinking. “What else can cause an impact?” opens it up.
- It builds confidence. Instead of “I don’t have a hammer, I’m stuck”, you think “What else can do the job?”
- In life: people often get depressed because they lack one specific thing. Abstraction shows them other ways to reach the same goal.
Habit 10: Divide and conquer
Break a big system or problem into smaller functions and sub-functions, solve each, and keep track of how they connect.
Lecture example — the printer A printer’s functions: paper feeding, ink/toner deposition, rollers carrying the paper… Each has sub-functions, and together they produce a printed page. Breaking a product down like this helps you design it, or work out how an existing product works (reverse engineering).
Historical example used in the lecture: the British used a “divide and rule” strategy, splitting Indian kingdoms against each other so they could control them one by one. The lesson here is only about the method of breaking big things into parts.
Breaking big goals into tiny steps (Prof. Prasanna)
- “A journey of a thousand miles begins with a single step.”
- To climb Everest, know the goal, then plan small steps.
- Small steps mean less stress: you can see your progress.
- Mistakes are small, so course correction is easy.
- Methods like Kaizen, Lean and Six Sigma all work by breaking big processes into small steps.
- 1% better each day → about 37 times better in a year (1.01³⁶⁵ ≈ 37.8).
- An engineer building a house: foundation first, then one floor at a time, and finally a beautiful building.
In one line: Switch between the big picture and the details, abstract a tool to its principle to find more options, and break big problems into small connected steps. Exam words: big picture (spatial and temporal), abstraction, detailing, why vs how questions, impact generator, divide and conquer, functions and sub-functions, reverse engineering, tiny steps, Kaizen, 1% better daily.