Control Charts for Variables vs. Charts for Attributes HW: Comment the following statement! Sometimes, the quality...

Control Charts for Variables vs. Charts for Attributes
HW: Comment the following statement! Sometimes, the quality control engineer has a choice between variable control charts and attribute control
charts.

Expert Solution

Variable control charts and attribute control charts are different types of quality control charts used by quality control engineer of a product or project. He can use either of them depending on the results desired from the control chart. Attribute control chart allows summarising the quality of the product into various aspects assigned for the quality criteria. Based on these criteria they can simply accept or not accept the product quality. It does not consider the other factors that can affect the quality control such as time taken in the measurement or the devices used. It gives more easy measurement scale and thus is easy to be used by engineers. Variable control charts give a more sensitive and detailed picture of the quality issue. It identifies the quality problem before they reach the final stage to be unaccepted. It helps in saving from an increased number of scrap in the production process. Hence if the engineer uses any one of the charts for a product, he can still know the quality of the product is acceptable or not.

keosha answered 1 month ago

Discuss the differences between Attributes Control Charts and Variables Control Charts and how you believe one...

Discuss the differences between Attributes Control Charts and Variables Control Charts and how you believe one can benefit a company/organization over the other, and why/why not. (Note: Pleaee, the answer has to be typed, not hand written nor a picture.) Thank you.

What are the advantages and disadvantages of control charts for attributes over those for variables?

Statistical process control charts: A. display upper and lower limits for process variables or attributes and...

Statistical process control charts: A. display upper and lower limits for process variables or attributes and signal when a process is no longer in control. B. display the measurements on every item being produced. C. are a graphic way of classifying problems by their level of importance, often referred to as the 80-20 rule. D. indicate to the process operator the average outgoing quality of each lot. E. indicate to the operator the true quality of material leaving the process.

How can one of the attributes control charts (p, np, c or u) could be used...

How can one of the attributes control charts (p, np, c or u) could be used to stabilize the process? Can you please give an example of a process from a quality perspective?

x bar and R control Charts A quality control inspector at the Company B has taken...

x bar and R control Charts A quality control inspector at the Company B has taken twenty-five samples with four observations each of the sample weight (g). The data are shown in the table. Construct x bar and R control charts for these data. Identify any out-of- control points. Assume these points (if any) are assignable. Remove them and recalculate the control limits. Construct the revised x bar and R control charts. Submit data (spreadsheet) and charts. Comment on the...

A manufacturing company wants to develop control charts to measure the quality of its steel plate....

A manufacturing company wants to develop control charts to measure the quality of its steel plate. They take ten sheets of 1" steel plate and compute the number of cosmetic flaws on each roll. Each sheet is 20' by 100'. Based on the following data. Sheet 1 2 3 4 5 6 7 8 9 10 # of flaws 1 1 2 0 1 5 0 2 0 2 a. Compute the lower control (LCL) limit b. Compute the upper...

what do you know about demerit system?suggest atleast two nonmacufacturing scenarios in which attributes control charts...

what do you know about demerit system?suggest atleast two nonmacufacturing scenarios in which attributes control charts could be useful for process monitoring.question from total quality management

The following exercise pertains to the Control Quality process. a. What does Control Quality monitor and...

The following exercise pertains to the Control Quality process. a. What does Control Quality monitor and what does it compare the results to? b. Describe inspection. c. How do inspection and prevention differ? d. What is attribute conformity? What is the resulting decision from attribute measurement results? e. Describe the purpose of control charts. What are they used for primarily? f. What are the common causes of variance?

11)Comment on how non-destructive tests can be selected for quality control and also to determine if...

11)Comment on how non-destructive tests can be selected for quality control and also to determine if a component has reached a point where it needs to be replaced. (i.e. Plane strain fracture toughness)

6.32. Control charts for ¯xx¯ and R are in use with the following parameters: ¯¯¯xx¯ Chart...

6.32. Control charts for ¯xx¯ and R are in use with the following parameters: ¯¯¯xx¯ Chart R Chart UCL = 363.0 UCL = 16.18 Center line = 360.0 Center line = 8.91 LCL = 357.0 LCL = 1.64 The sample size is n = 9. Both charts exhibit control. The quality characteristic is normally distributed. What is the α-risk associated with the ¯xx¯ chart? Specifications on this quality characteristic are 358 ± 6. What are your conclusions regarding the ability...

Question