Answer:
Exact flow time in hours
13.64416 hours
% value added flow time = 0.3236
Step-by-step 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%