In a process where total time is 140 minutes and the value-added time is 90 minutes, what is the percentage of value added?

To find the percentage of value-added time in a process, you take the value-added time and divide it by the total time, then multiply by 100 to convert it to a percentage. In this case, the value-added time is 90 minutes, and the total time is 140 minutes.

By performing the calculation:

1. Calculate the value-added time as a fraction of the total time:

[

\frac{\text{Value-Added Time}}{\text{Total Time}} = \frac{90}{140}

]

2. Convert this fraction to a percentage:

[

\frac{90}{140} = 0.642857 , (\text{approximately})

]

[

0.642857 \times 100 \approx 64.29%

]

This rounds to approximately 64%. Therefore, the correct answer is that the percentage of value-added time is 64%. This indicates that about 64% of the total time spent in the process is considered valuable, as it directly contributes to the product or service being delivered, highlighting the efficiency and effectiveness of the process.

This understanding can also serve to identify areas for improvement by comparing