MGT $321$ Operations Management I

Assignment $9(50$pts$)$

$1.$ A pull system is always better than a push system. True or false? Discuss.

$2.$ Problem #$3$

Product A consists of subassemblies B and C$.$ Subassembly B requires two parts of D and one part of E$.$ Subassembly C requires one part of D and one part of F$.$

Draw a product structure tree and indented Bill of Materials $($BOM$)$ for this product.

How many initial parts are needed to make $300$ units of finished product?

$3.$ Problem #$8$

A telephone is assembled from a handset and a base. The handset in turn is assembled from a handle and a cord, and the base is assembled from a case, a circuit board, and a face plate. A BOM along with the numbers of parts on hand and lead times, are shown as follows.

On Hand

Lead Time $($Weeks$)$

Phone

$200$

$1$

Handset

$300$

$1$

Handle

$250$

$2$

Cord

$75$

$2$

Base

$250$

$1$

Case

$225$

$2$

Circuit board

$150$

$1$

Face plate

$300$

$2$

Management would like to start assembling phones as soon as possible. How many phones can be made from the available parts, and when can they be delivered? Construct a MRP to show your answer.

Suppose another $100$ circuit boards can be obtained within one week. What effect will this have on your answer for part a$?$