Problem
Kinga Doll Company manufactures different versions of its popular girl doll, Shari. Doll making at Kinga involves three basic operations: molding the body and hair, painting the face, and dressing the (loll. Changing between different versions of the doll requires setup time at the molding and painting stations. The table below shows the setup times for a batch and processing time for each unit at each step.
|
Step
|
Setup time
|
Processing time
|
|
Molding
|
15 minutes
|
0.25 minutes per doll
|
|
Painting
|
30 minutes
|
0.15 minutes per doll
|
|
Dressing
|
No setup
|
0.35 minutes per doll
|
Assumptions:
- Setups need to be completed before processing time
- A setup can only start once the batch has arrived at the resource
- All flow units of the batch need to be processed at a resource before any units can he moved to the next resource
a. What is the process capacity in dolls per hour with a batch size of 400 dolls?
b. What is the time required to process the first batch of 400 dolls starting with an empty system?
c. For what hatch size is Painting the bottleneck?