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A team wants a technique for obtaining a large number of possible reasons for excess variation in a dimension. They should use:
Causes in a cause and effect diagram often include management, measurement systems, mother nature and the four standard causes:
A ____ from a sample is used to estimate a population _____. The two words that best fill these blanks are:
A team’s goal is to improve information flow in a payroll function. They make thirty-three Post-It® notes, each listing an issue for further investigation. After some discussion, they group them into four categories: mandated record keeping, privacy concerns, insurance concerns and transfer concerns.
This grouping process is best described by which approach to problem solving?
If the probability that an event will occur is 0.83, then the probability that the event will not occur is:
In a resolution III fractional factorial experimental design, main effects are confounded with:
In a series of linked processes and associated feedback loops the product or service flows ________ and the information flows ________.
(Refer to the previous problem) The variance of the five replications for each run is calculated. Most of these variances are approximately equal but two are significantly lower than the others. The experimenters would be especially interested in those two runs if they want to optimize:
A team wants a technique for doing an initial study of a process that not every team member is familiar with. They should use:
Typically, which of the following actions is NOT used to reduce process cycle time?
The mean, median and mode of a distribution have the same value. What can be said about the distribution?
An advantage of using standard deviation rather than range for measuring dispersion of a large sample is that:
All of the following experimental designs can be used to investigate interactions EXCEPT
According to Juran, when a major quality improvement project is launched, which of the following describes the desired change in performance level?
Which of the following best describes a controlled variable whose influence on a response is being studied?
One of the approaches used by TRIZ is referred to as “removing the contradiction.” A project team is asked to determine how many coats of paint should be applied to a panel. In this case the contradiction is:
Which of the following tools is used extensively in quality function deployment (QFD)?
The process of having a six sigma team develop a problem statement helps the team to?
An assembly line has 3???? × 3???? squares painted behind each person. Signs indicate the parts and quantities that should be placed there. This is an example of:
The formula for reliability during constant failure rate conditions is: Use this formula to find the reliability of a product at 800 hours if MTBF = 600 hours.
What is the standard deviation of a process that operates to an exponential distribution with a mean of 25 units?
This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 5?
The average number of defects is 21.6. Find the upper control limit for the c-chart.
A meeting is called for all three shifts to determine the settings to be used on machine #45. This is an example of:
In Control chart interpretations, how many business rules (Shewart Rule's) will be used to interpret for stable process?
In a certain sampling situation, ???? = 0, ???? = 0.08. The power of the sampling plan in this case is:
The essence of Lean is to concentrate effort on removing variation from a process output while lowering cost. (True/False)
For a line in an FMEA form a team has established the following:
Cost: $82
Severity: 7
Occurrence: 9
Detection: 4
Target date: 7 days
What should the risk priority number (RPN) be for this line:
Which of the following types of variation is LEAST likely to occur in sequential repetitions of a process over a short period of time?
A set of data from a process has 8 readings per sample and 50 samples. The mean of the 50 sample means is 12.62. The mean of the 50 ranges is 0.18. Find the control limits for the xbar chart.
The Organization Specification limits are + 5 or - 5 % whereas Control Limits are + 6 % & -2%, justify whether the Process is?
A team has been asked to reduce the occurrence of a particular defect. They begin by brainstorming all possible causes using a:
For a normal distribution, two standard deviations on each side of the mean would include what percentage of the total population?
An x-bar control chart has been established with control limits of 3.245 and 3.257, n = 5. An engineer collects the following sample and plots the average on the control chart: 3.257, 3,256, 3. 258, 3.259.
A six sigma team has been formed to improve an existing process. Which of the following tools should the team use first to gain a clear understanding of the current process?
This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 7?
The following contingency table was developed for an organization.
On the basis of this information, what is the expected number of oil changes for Station 1?
This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 13?
Lean Enterprise is based on the premise that anywhere work is being done which of these is also occurring?
There have been some instances in which 1.5 inch sheet metal screws are used where 1.25 inch should have been used. This produces a critical defect. The decision is made to have all 1.25 inch screws have a square reduced head and all 1.5 inch screws be Phillips. This is an example of:
Lean removes many forms of ______________ so that Six Sigma can focus on reducing _______________.
Ratio and Interval Scale of measurements are based on ______________type of data.
If the value of the test statistic had been 0.185, what action should have been taken regarding the null hypothesis?
A correct statement about the relationship between the terms parameter and statistic is:
A team wants a technique for improving consistency of assembly operations. They should use:
The preferred method for determining statistically whether factor A or B is significant requires what additional information?
SCENARIO A Six Sigma team is measuring the moisture content of corn starch as it leaves the conveyer belt of a dryer. They collect one sample four cups of starch at times indicated in the chart at fixed locations labeled A, B, C, and D across the end of the belt. See the diagram below.
Find the sample linear correlation coefficient and the sample coefficient of determination for the data in problem VI.11.
A machine tool vender wants to sell an injection molding machine. The current machine produces 3.2% defectives. A sample of 1100 from the vender’s machine has 2.9% defective. Do these numbers indicate that the proposed machine has a lower rate of defectives?
Deming called the technique of studying a sample to gain understanding of the distribution of a population an “enumerative study.” His main objection to these studies was:
This table displays the inventory of fasteners in a storage cabinet. An item is selected at random from the fastener cabinet. Find the approximate probability it is size 3/4.
Samples of size n=36 are randomly selected from a population with mean μ = 125 and variance 12. Find the variance of the distribution of sample means.
This table displays the inventory of fasteners in a storage cabinet. An item is selected at random from the fastener cabinet.
Find the approximate probability it is larger than 1/2.
This table displays the inventory of fasteners in a storage cabinet. An item is selected at random from the fastener cabinet. Find the approximate probability it is a bolt.
If the probability that event A occurs is 0.51, the probability that event B occurs is 0.64 and that probability that both A and B occur is 0.23 then:
A population is bimodal with a variance of 5.77. One hundred samples of size 30 are randomly collected and the 100 sample means are calculated. The standard deviation of these sample means is approximately:
The management team in the above problem assigns each goal a numerical value designating its importance. The “bulls eyes,” circles and triangles are replaced by the values 3, 2 and 1 respectively. Entries are made in each box by multiplying the 3, 2 or 1 by the goal value.
The importance of each activity is calculated by adding the entries in its row.
In problem 1, do the data indicate that the population for machine A has a larger standard deviation?
A team working with a plant relocation is tasked with designing a process for moving 180 pieces of equipment. Incoming orders may need to be filled during the move at either the old site or the new one. Transportation equipment availability is uncertain. Construction schedules at the new site is very weather dependent. The team designs a chart that attempts to cover these and other contingencies with appropriate measures dealing with each.
The tool best fitted for this task is:
The average weight of castings produced at the Nebraska foundry is 3.7 lbs. A new supplier from Kansas has submitted a batch of castings known to have normally distributed weights. A random sample of 10 has an average weight of 3.6 lbs. and standard deviation 0.06 lbs. Do these data indicate that the Kansas foundry produce lighter castings on average?
SCENARIO
A Six Sigma team is measuring the moisture content of corn starch as it leaves the conveyer belt of a dryer. They collect one sample four cups of starch at times indicated in the chart at fixed locations labeled A, B, C, and D across the end of the belt. See the diagram below.
After some work on the dryer, additional data are collected which when plotted looks like this:
Which type of variation dominates?
George is an employee of Black, Inc. John is George’s internal customer. Which statement is true?
A team wants a technique for displaying the connection between various customer needs and various features on a product. They should use:
The support for an important quality initiative was lacking in congress until Reagan’s Secretary of Commerce was killed in a horseback riding accident in 1987. That initiative was:
This table displays the inventory of fasteners in a storage cabinet. A bolt is selected at random from the fastener cabinet. Find the approximate probability it is size 7/8.
If the probability that event A occurs is 0.51, the probability that event B occurs is 0.64 and events A and B are statistically independent then:
There are 14 different defects that can occur on a completed time card. The payroll department collects 328 cards and finds a total of 87 defects. DPU =
A project activity not on the critical path has required 20% longer than the time originally allocated. The project team should:
The primary metric for a project is reduced cost for process A. Baseline data might include:
A management team lists nine goals across the top of a rectangle and 15 activity initiatives along the left hand side of the rectangle. If one of the activities strongly supports one of the goals a circle is placed in the box where that activity’s row intersects the goal’s column. If the activity’s support is very strong a “bulls eye” is placed in the box and if the support is weak a triangle is used.
This best describes which problem solving tool?
TESTED 16 May 2024
