Ops-571 Assignment
Process Improvement Plan
YOUR NAME HERE
University of Phoenix
OPS/571 â Operations Management
DATE HERE
Process Improvement Plan Successful organizations continuously strive to improve the processes they have in place. Process improvement leads to better quality control, higher efficiencies and lower costs. In order to implement a process improvement plan, it is necessary to collect and analyze data from the process. In this paper, I present an analysis of the metric data collected for the process I identified during week #1. As part of the analysis, the control and confidence limits are calculated, as well as other relevant statistics. With this information, a process improvement plan is …show more content…
Confidence intervals A confidence interval is the range of values where the population parameter falls with a specified probability; this probability is referred to as level of confidence (Lind, Marchal, & Wathen, 2010.) For the process under consideration, the parameter of interest is the mean driving time. Given the inherent variability of traffic conditions in urban areas, it is appropriate to find the confidence interval with a 90% level of confidence.
There are only 25 numbers in the sample collected. For purposes of analysis, it will be considered that the process itself is normally distributed, and its standard deviation is unknown. Under these conditions, the formula that gives the confidence interval is:
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where n is the sample size, t is the t-student value for the respective level of confidence and sample size, s corresponds to
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