A maintenance group aims to improve the effectiveness

Reference no: EM13717646

A maintenance group aims to improve the effectiveness of its repair work. The group therefore monitors the number of maintenance requests that require a second visit to complete the repair. On any given week the maintenance group responds to 200 maintenance requests. The following table summarizes the number of those maintenance requests that required a second visit in the last five weeks.
Week Number 1 2 3 4 5
Number of those maintanance requests
that required a second visit
6 8 9 7 3
What type of control chart should be used here?
Select one:
a. mean chart
b. range chart
c. p-chart
d. c-chart
e. run test

An automobile manufacturer wishes to control the number of nonconformities (defects) in a subassembly area, producing manual transmissions. The inspection unit is a single transmission and the data for 10 samples are shown below:
Transmission Number 1 2 3 4 5 6 7 8 9 10
Number of Nonconformities (defects) 1 5 2 0 1 1 3 4 3 2
What type of control chart should be used here?
Select one:
a. mean chart
b. range chart
c. p-chart
d. c-chart
e. run test

Reference no: EM13717646

Questions Cloud

Long cylindrical electrical heating element of diameter : A long cylindrical electrical heating element of diameter D=10mm, thermal conductivity k=240 W/mC, density =2700 kg/m^3 and specific heat c_p=900J/kgC is installed in a duct for which air flows in a cross flow over the heater at a temperature and vel..

Determine the heat transfer rate per unit width from plate : Water at 10C and a velocity of .6 m/s flows over one surface of a 1.5 m long flat plate maintained at 44C. Consider the following: Determine the heat transfer rate per unit width (W/m) from plate.

Looks like a cylinder except that the side is wavy : 24. An old urn is discovered that looks like a cylinder except that the side is wavy. The urn is 6 inches high. Scientists want to estimate the volume of the urn so they measure its circumference at intervals of 2 inches, and produce the follow..

To monitor the proportion of green m&m''s in packages of m&m : To monitor the proportion of green M&M's in packages of M&M's, a quality control manager picked at random 20 M&M packages, each with 300 M&M's in them. The manager computed the proportion of green M&M's across all these packages as 0.15. What ..

A maintenance group aims to improve the effectiveness : A maintenance group aims to improve the effectiveness of its repair work. The group therefore monitors the number of maintenance requests that require a second visit to complete the repair. On any given week the maintenance group responds to 20..

Discuss the relationship between the sum of the probabilitie : Discuss the relationship between the sum of the probabilities in a probability distribution and the total area represented by the bars in a probability histogram

Relative humidity is cooled at constant pressure : A system consisting initially of 0.5 m3 of air at 35Â°C, 1 bar, and 70% relative humidity is cooled at constant pressure to 29Â°C. Determine the work and heat transfer for the process, each in kJ.

Find the speed of the plane in still air : A plane flies 540 miles for 2 hours in the direction of the wind. Then it turns around and flies 690 miles for 3 hours against the same wind. Find the speed of the plane in still air and the wind speed.

Ratio of turbulent to laminar heat transfer coefficients : Water at a local bulk temperature of 24°C flows at 0.8 m/s through a smooth, 1.5-cm-ID tube that is kept at 30°C and the flow is fully developed. The system is extremely clean and quiet, and the flow stays laminar until a noisy air compressor is turn..

User Account

All Pages