Operations Management (McGraw-Hill Series in Operations and Decision Sciences)
12th Edition
ISBN: 9780078024108
Author: William J Stevenson
Publisher: McGraw-Hill Education
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Chapter 10, Problem 11P
Summary Introduction
To estimate: The percentage of process output that can be expected to fall within the specifications and determine whether the specifications are being met.
Introduction: Quality is a measure of excellence or a state of being free from deficiencies, defects and important variations. It is obtained by consistent and strict commitment to certain standards to attain uniformity of a product to satisfy consumers’ requirement.
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This exercise contains only parts a and b.
a) For the given data, the
x= ____ hours (round your response to three decimal places).
For the given data, mean range =_____hours (round your response to two decimal places).
With
z=3,
the control limits for the mean chart are:
UCLx= ____hours (round your response to three decimal places).
LCLx=____hours (round your response to three decimal places).
The control limits for the range chart are:
UCLR=____hours (round your response to two decimal places).
LCLR=h____ours (round your response to two decimal places).
With these limits established, West now takes 5 more hours of data, which are shown in the following table. Calculate the mean and range for each hour that the sample data is taken. (Enter your responses for the mean to…
A hospital is using X bar and R charts to record the time it takes to process patient account information. A sample of five applications is taken each day. The first four week's (20 days) data give the following values:
X=16 min
R= 7 min
The upper and lower specifications are 21 minutes and 13 minutes respectively. What is the CPK of this process?
The mean service time (x¯) of a hairdresser is 18 minutes with a standard deviation (σ) of 2 minutes. Upper specification limit (USL) is 22 minutes, whereas lower specification limit (LSL) is 15 minutes for this process. What is the process capability index (cpk) for this process? Is the process capable?
Cpk=0.67, capable
Cpk=1.5, capable
Cpk=0.67, not capable
Cpk=0.5, capable
Cpk=0.5, not capable
Chapter 10 Solutions
Operations Management (McGraw-Hill Series in Operations and Decision Sciences)
Ch. 10.2 - A potato chip is a delicate thing Fragile A pound...Ch. 10.2 - A potato chip is a delicate thing Fragile A pound...Ch. 10.5 - It's estimated that more than 7 000 hospital...Ch. 10.5 - It's estimated that more than 7 000 hospital...Ch. 10 - Prob. 1DRQCh. 10 - Prob. 2DRQCh. 10 - Prob. 3DRQCh. 10 - Prob. 4DRQCh. 10 - Prob. 5DRQCh. 10 - Prob. 6DRQ
Ch. 10 - Prob. 7DRQCh. 10 - Prob. 8DRQCh. 10 - Prob. 9DRQCh. 10 - Prob. 10DRQCh. 10 - Prob. 11DRQCh. 10 - Prob. 12DRQCh. 10 - Prob. 13DRQCh. 10 - Prob. 14DRQCh. 10 - Prob. 15DRQCh. 10 - Prob. 16DRQCh. 10 - Prob. 1TSCh. 10 - Prob. 2TSCh. 10 - Prob. 3TSCh. 10 - Prob. 1CTECh. 10 - Prob. 2CTECh. 10 - Prob. 3CTECh. 10 - Prob. 4CTECh. 10 - Prob. 1PCh. 10 - Prob. 2PCh. 10 - Prob. 3PCh. 10 - Prob. 4PCh. 10 - Prob. 5PCh. 10 - Prob. 6PCh. 10 - Prob. 7PCh. 10 - Prob. 8PCh. 10 - Prob. 9PCh. 10 - Prob. 10PCh. 10 - Prob. 11PCh. 10 - Prob. 12PCh. 10 - Prob. 13PCh. 10 - Prob. 14PCh. 10 - Prob. 15PCh. 10 - Prob. 16PCh. 10 - Prob. 17PCh. 10 - A production process consists of a three-step...Ch. 10 - Prob. 19PCh. 10 - Prob. 20PCh. 10 - Prob. 21PCh. 10 - Prob. 22PCh. 10 - Prob. 23PCh. 10 - Prob. 24PCh. 10 - Prob. 25PCh. 10 - Prob. 26PCh. 10 - Prob. 27PCh. 10 - Prob. 28PCh. 10 - Prob. 29PCh. 10 - Prob. 1.1CQCh. 10 - Prob. 2.1CQCh. 10 - Prob. 2.2CQCh. 10 - Prob. 2.3CQCh. 10 - Prob. 2.4CQ
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- The production process for an electronic product has 12 major steps. If each of the first six production steps is at a 5-Sigma quality level and the remaining steps are at a 5.5 sigma quality level, calculate the total percentage of error-free products manufactured.arrow_forwardA new industrial oven has just been installed at the Piatt Bakery. To develop experience regarding the oven temperature, an inspector reads the temperature at four different places inside the oven each half hour. 8:00 am 350 350 355330 9:00 am 344 342 338340 10:00 am 341 345 347 350 Lower and upper limits, respectively, for S-chart are: O a. O and 13.18 O b. O and 10.68 O c. 13.18 and 0 O d. O and 10.10 O e. None of themarrow_forwardA spring water factory ensures that each water bottle contains precisely 16.9 fluid ounces with an acceptable margin of error of 0.1 fluid ounces. If the standard deviation of the water bottles is 0.06 fluid ounces, what is the process capability ratio (Cp) of the water bottles? 0.56 01 1.2 1.67arrow_forward
- Exercise: In a given MISO-type automation system in a chemical industry, where the fluid flow is controlled based on input data, the control system manager performs analysis of operation of the mesh and finds that the time to achieve the expected result is currently 25% longer than the time required for the same situation when the process was implemented 5 years ago. Given the characteristics of the process under analysis, determine the improvement action to be taken by the manager so that the time deviation is minimized, justifying its response with subsidies that substantiate your claims. Consider that the process flow had no changes in the period and that the control actions remain the same.arrow_forwardBackground information: Allison collected additional days of data to monitor the process. Steps to monitor using the control charts: Now monitor the process. An additional ten days of data have been collected, see table labeled “1st 10 Days of Monitoring Reservation Processing Time” in the Data File. Develop Xbar and R charts for the 1st 10 days of monitoring. Plot the data for the 1st 10 days on the Xbar and R charts. Is the process in control? If the control chart indicates an out-of-control process, note which days, the pattern, and whether it is the Xbar or R chart. Now that we have set up the control charts using enough data from a stable process, the 30 days of data, we will monitor the process. While monitoring the process, what will we use as the lower control limit for the X-bar Chart to compare against our new x-bar values ? Enter your response to three decimal places. You do not need to include the units (minutes), ONLY the numeric value. USE EXCELL DATA TO GET…arrow_forwardA sales completion team, aiming to reduce the shipment time of urgent orders, studies the current process and finds that the current shipment time has a mean of 4 days with a standard deviation of 1.5 days. Industry expectations are for urgent shipments to be delivered between 1 and 5 days.(1) What is the current process capability Cpk? Please keep 4 decimal places for your answerarrow_forward
- At Quick Car Wash, the wash process is advertised to take less than 7 minutes. Consequently, management has set a target average of 390 seconds for the wash process. Suppose the average range for a sample of 10 cars is 11 seconds. Part 2 The UCL Subscript Upper R equals seconds and the LCL Subscript Upper R equals seconds. (Enter your responses rounded to two decimal places.)arrow_forwardFor the given information, the process capability index (Cpk) = ? (enter your response here) (round your response to two decimal places).arrow_forwardCanine Gourmet Super Breath dog treats are sold in boxes labeled with a net weight of 15 ounces (425 grams) per box. Each box contains 10 individual 1.5-ounce packets. To reduce the chances of shorting the customer, product design specifications call for the packet-filling process average to be set at 43.5 grams so that the average net weight per box of 10 packets will be 435 grams. Tolerances are set for the box to weigh 435 plus or minus 11 grams. The standard deviation for the packet-filling process is 1.02grams. The target process capability ratio is 1.33. One day, the packet-filling process average weight drifts down to 43.0 grams. Is the packaging process capable? Is an adjustment needed? Since the process capability index, Cpk is the process is not capable or is capable.arrow_forward
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