Question
1-20 please
true or false
1 T F The SPC techniques can only be used for manufacturing quality products. 2 T F Standard deviation is a measure of variability or a data distribution 3 T F Assignable causes are always presctable in aprocess 4 T F Common cause variations always present in a process s T F In an effective process control limits should be greater than specification limits 6 T F A unit of product can contain nonconformities and the unit still be classified as 7 T F Attribute control charts are getserally more sensitive than variable coeurol charts 8 T F For SPc analysis, sample size >20 is always better 9 T F Understanding the Normal Distribution is vital for application of SPC 10 T F PCR, cp, cre are measures of process capability 11 T F Cris shows how bad a process is when it is off center 12 T F The normal distribution curve generally concentrates on the percentage of the product that is out of specific compsees the whole tolerance with six (6) sigma 14 T F Measures of process variation incluse standard deviation, mange, and variance F Average and range or sigma charts are used to determine if special causes of 15 T variation has caused the process to change. 16 T F is highly recommended that charts be used before vaiabe ar situation. 17 T F 1n control chart interpretation, a trend or run is defined as a group of 7 or more points are on the same side of the mean. 18 T F A score of a data point is the number of standard deviations from the mean ifthe 2- Process is in normal distribution 19 T F Run charts are the most sensitive among the SPC techniques 20 T F ntrol charts typically require more measurements than variable control Attribute
Explanation / Answer
1. False - The SPC technique can also be used for other purposes
2. False- Variance is the measure of variability
3. True- Assignable causes are always predictable
4. True- Common causes are always present in the process
