A histogram is a bar graph that displays the frequency of a set of categorized data (Thomas, 2001). A histogram can be used as a quality control tool by observing the distribution of outcome of processes against pre-set benchmarks (Juran, 1988). The visual display imposed by histograms presents one of the easiest ways of evaluating the distribution of the given data. Organizations can make use of histograms by comparing their performance in various instances such the sales level with other similar organizations.
The term Quality may mean different things to different parties in a society depending on their position (Russell, Roberta, & Bernard, 2003). Nonetheless, every individual wants to obtain the highest degree of satisfaction from the consumption of products. Various players in the economy have various perspectives to quality. These players may include consumers, producers and manufacturers. This essay will take a manufacturer’s perspective in analyzing the production of hard disk drives by an electro-mechanical assembly. It will employ the use of histograms to interrogate the manufacturing process against pre-set specifications.
Analysis of the Figure 1 below
The pre-set specification A was set between 11.5+/-1.0 mm. All the first 60 units made fell within this range as shown in figure1below. Therefore, the process is efficient in that the first units built were within the specified range.
Analysis of Figure 2 below
The preset specification B was within the range of 8.5+/-2. The outcome from the manufacture of the first 60 units showed a frequency distribution within this range with the highest frequency showing a normal distribution as displayed above in figure 2. Hence, the manufacturing process of the electric assembly is efficient and likely to yield high quality hard disk drivers.
Analysis of figure 3
The preset specification of the current consumed amperes in order to move the solenoid during the manufacture of the units was 2.5 amperes. The actual manufacturing of the first 60 units indicates that the current requirements were less than the specification. As such, the manufacture of the units resulted in saving of power which beneficial to the electro-mechanical assembly in regard to energy costs.
Juran, J. M. (1988). “Juran’s Quality Control Handbook”. New York: McGraw-Hill,.
Russell, Roberta, S., & Bernard, T. I. (2003). Operations Management. Upper Saddle River, New Jersey: Prentice Hall, Inc.
Thomas, F. S. (2001). Managing Quality An Integrative Approach. New Jersey: Prentice Hall.