Question

Dunder Mifflin Company has the following departmental manufacturing layout for one of its plants:

Wait time – 10 minutes ------ Casting 12minutes

Move and wait time – 15 minutes -------Grinding 6 minutes

Move and wait time – 25 minutes ------- Drilling 10 minutes

Move and wait time – 20 minutes -------Finishing 2 minutes

A consulting firm has recommended a value stream with the following manufacturing cell:

Casting 12 minutes ---- Grinding 6 minutes -----Drilling 10 minutes ----- Finishing 2 minutes

Required:

1. Calculate the total time it takes to produce a batch of 20 units using the traditional departmental manufacturing layout.

minutes (670)

2. Using cellular manufacturing, how much time is saved producing the same batch of 20 units?
minutes

Assuming the cell operates continuously, what is the production rate?
units per hour

3. Assume the processing time of Casting is reduced to 9 minutes, while the times of the other processes stay the same. What is the production rate now?

units per hour

How long will it take to produce a batch of 20 units if the cell is in a continuous production mode?

minutes

Answer 1

1.total time it takes to produce a batch of 20 units using the traditional departmental manufacturing layout.

It is 670 minutes

Move and wait time - 10+15+25+20 =70 mins

Manufacturing time =( 12+6+10+2)*20 units = 600 mins

Total - 670 mins

2. Using cellular manufacturing, how much time is saved producing the same batch of 20 units

70 minutes saved

It eliminate move and wait time, hence total 600 minutes will be utilised for production.

3.Assume the processing time of Casting is reduced to 9 minutes, while the times of the other processes stay the same.

Manufacturing time =( 9+6+10+2)*20 units = 540 mins

Hence for a batch the time will be 9 hours