The McGraw- Hil 36-Hour Course Operations 140 fit pe 2. How are common causes di

Question

The McGraw- Hil 36-Hour Course Operations 140 fit pe 2. How are common causes different from assignable causes? Re Assignable causes enable the manager to assign blame. a. b. Common causes are purely random. 23 Common causes indicate that the process is out of control c. d. Assignable causes are unavoidable. 3. Which of the following is not one of the decisions to be made when imnl ing SPC? a. Which rule of thumb you should use to identify improbable results b. What quality characteristic you should measure c. What your sampling plan is d. How much risk you are willing to accept for being wrong Which of the following guidelines should be considered when deciding where to take measurements in a process? a. Where the cost of poor quality is greatest b. After a bottleneck C. Before a step that would obscure important quality characteristics d. a and c e. 4. All of the above r ult ho llowing factors is used to estimate the standard deviation, whe

Explanation / Answer

2) Common causes of variation are the usual quantifiable and historical variations in a system that are natural. It is ongoing, consistent and predictable, but purely random and unavoidable.

Assignable/Special causes of variation refer to unexpected glitches that occur in a process. They are unpredictable, but can be identified and eliminated.

So, answer is option b.

3. SPC foucsses on results which are probable and controllable.So answer is option a

4. It is futile to take measurements after a bottleneck. So, option b can be eliminated. Option a and Option c are definitely correct. So the answer is option d

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