Exam 7: Process Strategies

A system using an automated work cell controlled by electronic signals from a common centralized computer facility is called:

The normal application of a p-chart is in:

The local newspaper receives several complaints per day about typographic errors. Over a seven-day period, the publisher has received calls from readers reporting the following total daily number of errors: 4, 3, 2, 6, 7, 3, and 9. Based on these data alone, what type of control chart(s) should the publisher use?

The ________ is a quality control chart that indicates when changes occur in the central tendency of a production process.

Activity times should not be included in a service blueprint.

Pierre's Motorized Pirogues and Mudboats is setting up an acceptance sampling plan for the special air cleaners he manufactures for his boats. His specifications, and the resulting plan, are shown on the POM for Windows output below. In relatively plain English (someone else will translate for Pierre), explain exactly what he will do when performing the acceptance sampling procedure, and what actions he might take based on the results.

A nationwide parcel delivery service keeps track of the number of late deliveries (more than 30 minutes past the time promised to clients) per day. They plan on using a control chart to plot their results. Which type of control chart(s) would you recommend?

Assignable causes:

The purpose of process control is to detect when assignable causes of variation are present.

A process that is in statistical control will not always yield products that meet their design specifications.

An organization is considering three process configuration options. There are two different intermittent processes, as well as a repetitive focus. The smaller intermittent process has fixed costs of $3,000 per month and variable costs of $10 per unit. The larger intermittent process has fixed costs of $12,000 per month and variable costs of $2 per unit. A repetitive focus plant has fixed costs of $50,000 per month and variable costs of $1 per unit. (a) If the company produced 20,000 units, what would be its cost under each of the three choices? (b) Which process offers the lowest cost to produce 40,000 units? What is that cost?

Additive manufacturing is often referred to as computer numerical control.

Which of the following industries is most likely to have low equipment utilization?

Identify the four basic process strategies, and describe them in a complete sentence or two each.

Which of the following phrases best describes product focus?

Successful process redesign focuses on departmental areas where small, continuous improvements can be made.

The specification for a plastic handle calls for a length of 6.0 inches ± .1 inches. The standard deviation of the process is estimated to be 0.04 inches. What are the upper and lower specification limits for this product? The process is known to operate at a mean thickness of 6.03 inches. What are the C_p and C_pk values for this process? Is this process capable of producing the desired part?

A process that is assumed to be in control with limits of 89 ± 2 had sample averages for the x-bar chart of the following: 87.1, 87, 87.2, 89, 90, 88.5, 89.5, and 88. Is the process in control?

McDaniel Shipyards wants to develop a control chart to assess 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, develop limits for the 3-sigma control chart, plot the control chart, and determine whether the process is in control.

A manager wants to build 3-sigma x-bar control limits for a process. The target value for the mean of the process is 10 units, and the standard deviation of the process is 3. If samples of size 9 are to be taken, what will be the upper and lower control limits, respectively?