Cycle-time analysis

Making a smartphone

(Mean: Standard Deviation)

Manufacture in China (5: 1.3)

Transport to port (2: 2.2)

Ship to LA (26: 8)

Truck to KC (3: 1.5)

Truck to NYC (2: 0.5)

Distribute to store (1: 0.2)

1) What is the Average completion time for the process?

2) What is the Standard Deviation for the entire process?

3) What is the Probability process to be completed in 40, 45, 50 days?

4) Construct a 97.5% confidence interval