1. List the 4 major sources of variation. 2. Your heart has different pulse rate

Question

1.              List the 4 major sources of variation.

2.              Your heart has different pulse rates defending on what daily type activities you are involved in. Is that an example of random or assignable variation?

3.              Once you have constructed your x-bar and r-charts, which one should you look at first and why?

4.              What measure is common to each of the formulas for the x-bar and r-charts?

5.              On an R-chart, the line for the lower control limit is dotted if the subgroup size is ___________ or

more.

Explanation / Answer

Dear student please post the questions one at a time.

1)

1) The variety of goods or services being offered:

The greater the variety of goods and services, the greater the variation in production or service requirements.

2. Structural variation in demand, such as trends and seasonal variations:

These aregenerally predictable.They are particularly important for capacity planning.

3. Random variation.

This natural variability is present to some extent in all processes,and it also present in demand for services and products, and (can/cannot)generally beinfluenced by managers

.4. Assignable causes of variation:

Variation caused by defective inputs, incorrect workmethods, out of adjustment equipment, and so on.This type of variation can be reduced or eliminated by analysis and corrective action

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