Why Manufacturing Companies adopted Lean Thinking and the JIT model?

Question:
1. Why Manufacturing Companies adopted Lean Thinking and the JIT model? (3.5 Marks)
2. Discuss major types of Waste, why overproduction is the biggest waste companies have to keep in mind during production. (3.5 Marks)
3. Assess the reasons for using lean thinking (suitable examples), what are the benefits from Suppliers to end users? (3.5 Marks)
4. With the advent of artificial intelligence. The agile supply chain is a perfect concept for future SCM? Give reasons with examples. (3.5 Marks)
5. Reference ((1.0 Marks))