Question

An order for 50 units is processed on work centers A and B. The set up time on A is 45 Min and run time is 5 min per piece. The set up time on B is 30 Min and run time is 4 min per piece. Wait time between the two operations is 8 hours. The move time between A and B is 60 min. Wait time after B is 8 hours and the move time into stores is 2 hrs. Queue at work center A is 25 hours and at B is 35 hrs. Calculate the total manufacturing lead time for the order.

Answer 1

5265 mins or 87.75 hours

Explanation:

There is a large amount of data in this question so we will first process it and simplify it

Given

Order = 50 units

Operation A

Setup Time = 45 mins

Run Time = 5 min/unit * 50 = 250 mins

Wait Time (Between A&B) = 8 hours = 480 mins

Move Time (Between A&B) = 60 mins

Queue Time = 25 hours = 1500 mins

Operation B

Setup Time = 30 mins

Run Time = 4 min/unit * 50 = 200 mins

Wait Time (After B) = 8 hours = 480 mins

Move Time (To Stores) = 2 hours = 120 mins

Queue Time = 35 hours = 2100 mins

Lead time refers to how long it takes from when the order is place to when it is delivered, so to calculate the total manufacturing lead time we will add all the above times which is 5265 mins or 87.75 hours