Question

1. Product A is assembled from 6 components. The components are B, C, D, E, F, G. Components B, D, and F are purchased from a supplier, complete and ready to assemble. Component C is assembled from parts H, I, and J. Component E is assembled from parts K and L. Component G is made in the plant from raw materials. Part H is made from parts M and N. Part L is made from parts P, Q, and R. Part N is made from parts S and T.
   1. Draw the product structure tree.
   2. If all assemblies and components take 2 days, what is the shortest time it will take to produce A?
   3. If components B, C, D, and parts F, H, I, K, P, Q, and T are in inventory ready for use, how long will it take to produce A? Justify your answer.

Answer 1

a)

The product structure tree is following:

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b)

In the product structure tree, we see that it has 5 levels.

and each assembly, component having 2 days lead time,

Shortest time to product A = 5*2 = 10 days

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c)

If components B, C, D, and parts F, H, I, K, P, Q, and T are in inventory, then remaining items required for production of A are: E, G, L, R

of these, items A, E, L, R span across 4 levels.

Therefore, time taken to produce A = 4*2 = 8 days