8. (A) The following table shows a four-step process. The necessary time for one

Question

8.

(A)

The following table shows a four-step process. The necessary time for one worker to perform each task on one unit is listed as well as the number of workers at each step. What is the utilization of Step 3? (use decimal format)

1

(B)

The following table shows a four-step process. The necessary time for one worker to perform each task on one unit is listed as well as the number of workers at each step. Available materials are limited to the amount sufficient for 9 units per hour and average hourly demand is 9 units.

What is the actual hourly output of this process?

(c)

The following table shows a four-step process. The necessary time for one worker to perform each task on one unit is listed as well as the number of workers at each step. Available materials are limited to the amount sufficient for 9 units per hour and average hourly demand is 9 units.

What is the actual hourly output of this process?

1

Explanation / Answer

A) From the table, it is understood that, For step-3, One worker is required for 2 Mins to finish this step.

Hence, time on step-3 will be 2 Mins. In this case, utilization = Time by step / Highest time by any step.

=2/8 * 100 = 25%.

If we have to calculate utilization at rate level, we need more information,

B) For the production of each unit, it takes - 3*5+2*7+1*6+4*3 = 15+14+6+12 = 47 Man Mins.

Here, we should understand the concept of predecessor steps in a process.

In this case, the cycle time of the process is = Highest time taken by any step, which is 7 Mins by step-2.

Hence, In an hour, we can produce --> 60/7 Units which are 8 Units.

9 Units cannot be manufactured in one hour by following these steps.

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