Question

In the welding operations of a bicycle manufacturer, a bike frame has a flow time of about 13.6 hours. The time in the welding operation is spent as follows: 3 hours waiting in front of the cutting machine for the batch to start, 3 hours waiting for the setup of the machine, 1 hour waiting for the other pieces of the batch to go through cutting, 2 minute at the cutting machine, and 3 hours waiting for the transfer to the welding machine. Then, at the welding machine, the unit spends 1 hour waiting in front of the welding machine for the batch to start, 1 hour waiting for the setup of the welding machine, 0.6 hour waiting for the other pieces of the batch to go through welding, 0.65 minute at the welding machine, and 1 hour waiting for the transfer to the next department.
1. Determine the exact flow time.2. What is the value-added percentage of the flow time?

Answer 1

Answer:

Exact flow time in hours

13.64416 hours

% value added flow time = 0.3236

Explanation:

Hours to start = 3

Set up = 3 hours

Time spent cutting = 2 minutes

Time through cutting = 1 hour

Transfer = 3 hours

Time waiting for welding machine = 1 hour

Time for set up = 1 hour

Time waiting for pieces of batch = 0.6 hours

Time at welding machine = 0.65 minutes

Time to transfer to next department = 1 hour

To get the exact flow time we convert the minutes to hour

2 minutes to hour = 2/60 = 0.03333

0.65 minutes to hour = 0.65/60 = 0.01083

We sum up all of these hours

3+3+0.03333+1+3+1+1+0.6+0.01083+1 = 13.64416 hours

1.

13.64416 is the exact flow time in hours.

2.

Value added percentage of flow time

13.64416-13.6

= 0.04416

Percentage = 0.04416/13.64416*100

= 0.003236x100

= 0.3236%