Concept explainers
a)
To determine: The type of control charts to be used to monitor the process.
Introduction: Statistical process control is the method that helps to measure and control the quality during the process of production.
b)
To determine: The 3-sigma control limits for the process.
Introduction: Statistical process control is the method that helps to measure and control the quality during the process of production.
c)
To determine: Whether the process is in control.
Introduction: Statistical process control is the method that helps to measure and control the quality during the process of production.
d)
To determine: The 3-sigma control chart and whether the process is in control.
Introduction: Statistical process control is the method that helps to measure and control the quality during the process of production.
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Chapter 6 Solutions
Operations Management
- Telephone inquiries of 100 IRS "customers" aremonitored daily at random by Xiangling Hu. Incidents of incorrectinformation or other nonconformities (such as impolitenessto customers) are recorded. The data for last week follow: a) Construct a 3-standard deviation c-chart of nonconformities.b) What does the control chart tell you about the IRS telephoneoperators?arrow_forwardDescribe how to construct process control charts and use them to determine whether a process is out of statistical control.arrow_forwardDistinguish variable and attribute data. What types of control charts are used for each? Explain with examples related to healthcare.arrow_forward
- Explain the concept and use of statistical quality control? Name control charts that can be usedarrow_forwardExplain how to construct process control chart and use them to determine whether a process is out of statistical control?arrow_forwardUsing appropriate examples, distinguish between ‘attributes’ and ‘variables’ with regards to the measures of quality in Statistical Process Control.arrow_forward
- 3.1.The Great North Woods Clothing Company sells specialty outdoor clothing through its catalog. A quality problem that generates customer complaints occurs when a warehouse employee fills an order with the wrong items. The company has decided to implement a process control plan by inspecting the ordered items after they have been obtained from the warehouse and before they have been packaged. The company has taken 30 samples (during a 30-day period), each for 100 orders, and recorded the number of defective orders in each sample, as follows Sample Number of Defectives Sample Number of Defectives 1 12 16 6 2 14 17 3 3 10 18 7 4…arrow_forwardWhat is a Control Chart? Its purpose, strengths and limitations?arrow_forwarda.) What type of control chart would you use to monitor this process and why? b.) What are the 3-sigma control limits for this process? Assume that the historical complaint rate is unknown.arrow_forward
- A garment manufacturer wants to set up a control chart for irregularities. Each week a random sample of 25 garments is collected from production and the number of irregularities is recorded. The table below gives the results for the past 20 weeks: 1 6 8 10 Sample Number Irregularities 11 2 3 4 5 7 9 8 12 4 16 5 8 17 10 11 16 20 Sample Number | Irregularities 11 12 13 14 15 17 18 19 7 12 13 8 17 11 9 10 (a) Using the data set up an appropriate control chart using a three sigma control limits. (b) Comment on the process. [8 marks] [2 marks] 9,arrow_forwardList three actions that can help to make findings and recommendations more persuasive. How can management use control charts as part of their ongoing monitoring activities?arrow_forwardWhat is the difference between sampling error and systematic error? Why are these important to understand?arrow_forward
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