Exam 14: Statistical Process Control

Use the information below to answer the following question(s). Use the "Factors for Control Limits" Table A.3 from the textbook where required: A control chart needs to be developed to determine if the temperature for a process is within control limits. Five samples each having 4 observations are taken and the sample measurements (temperature in degrees F)are noted in the table below: Sample Observation 1 Observation 2 Observation 3 Observation 4 1 250 253.5 249 251.2 2 252 250.3 252 249.5 3 247.6 251 250 249.8 4 253.5 249 251 250.3 5 252 248.5 249.8 250.7 -What is the LCL for a R chart?

A quality manager concludes that a process is stable.This means that

The jump in sales of hand sanitizers experienced by the manufacturer of sanitizing products due to a scare of H1N1 virus outbreak is known as ________ variation.

Data gathered to check if a process is stable is called ________.

The control chart used to measure the number of defects per unit is called the

The rule that states that sampling distributions generally are normally distributed is known as the ________.

Use the information below to answer the following question(s). Use the "Factors for Control Limits" Table A.3 from the textbook where required: A control chart needs to be developed to determine if the temperature for a process is within control limits. Five samples each having 4 observations are taken and the sample measurements (temperature in degrees F)are noted in the table below: Sample Observation 1 Observation 2 Observation 3 Observation 4 1 250 253.5 249 251.2 2 252 250.3 252 249.5 3 247.6 251 250 249.8 4 253.5 249 251 250.3 5 252 248.5 249.8 250.7 -What is the UCL for a X-bar chart?

Fifty sample measurements of the length of an automotive component yield a grand mean of 1.33 inches with an estimated standard deviation of 0.2 inches.The specification length is between 1.2 and 1.4 inches.Calculate the process capability index.

Use the information below to answer the following question(s). An inspector visually inspects 10 samples of 200 computer monitors each for defects. Using trained judgement,the inspector either accepts or rejects the monitors based on whether they are flawless. The table below gives the results of these inspections from the 10 samples: Sample Defectives (out of Number 200 per sample) 1 5 2 4 3 6 4 3 5 4 6 4 7 6 8 5 9 2 10 5 -What is the LCL for a p chart?

The control chart used to monitor the dispersion of a process is called the

The control chart used to monitor the average of the characteristic being measured is called an R-chart.

The ratio between the cost of inspection and the cost of failure resulting from a particular step in the process is called ________.

Use the information below to answer the following question(s). An inspector visually inspects 10 samples of 200 computer monitors each for defects. Using trained judgement,the inspector either accepts or rejects the monitors based on whether they are flawless. The table below gives the results of these inspections from the 10 samples: Sample Defectives (out of Number 200 per sample) 1 5 2 4 3 6 4 3 5 4 6 4 7 6 8 5 9 2 10 5 -What is the average proportion defective?

A process that exhibits nonrandom variation is a(n)________ process.

On a control chart,how many successive data points on an increasing or decreasing line require an investigation for cause of progressive change?

Variation that results from a specific event,which may be a shift in a process mean or an unexpected occurrence,is known as ________ variation.

The width of a distribution is called the ________.

Five points in sequence,either above or below the mean are called ________.

Samples which are ordered by time or sequence are called systematic samples.

A control chart needs to be developed to determine if the proportion of late deliveries of a pizza delivery restaurant is within control limits.The control chart which would be most appropriate to use in this situation would be the