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Useful risk management tools
Published in Dennis Lock, Shane Forth, The Practitioner Handbook of Project Controls, 2020
A Pareto chart communicates the results of an analysis that aims to narrow down the sources of trouble by ranking or prioritizing data in their order of importance. The Pareto principle means that, for nearly every event or consequence, only a small number of all the contributing factors will account for the bulk of the effect. Drawing a Pareto chart requires the following steps:Classify and group data based on shared characteristics (such as non-conformances, downtime or customer complaints).Organize the data in order of their magnitude on the vertical axis.Arrange the groups along the horizontal axis. Begin at the extreme left with the one costing the most or occurring most frequently. Proceed from left to right in descending order of value or frequency.Draw vertical bars scaled to their values on the vertical axis.Draw a curve from left to right across the top of the bars to fit the cumulative item totals. This curve will end at 100 per cent in the upper right-hand corner and will complete the Pareto analysis.
Facilitating Kaizen Events for Suppliers and Customers
Published in Darren Dolcemascolo, Improving the Extended Value Stream, 2019
Pareto chart. A pareto chart is one of the most commonly used tools for identifying the key factors in a process that have the greatest effect. It graphically depicts the relative importance of causes, defects, and other aspects of a process. For example, a pareto chart may be used for: Identifying the defects that recur most oftenIdentifying the top causes of a particular recurring defectIdentifying the biggest contributing factors to the cost of a product
BASICS Model: Check (C)
Published in Protzman Charles, Protzman Dan, Keen William, The BASICS Lean™ Implementation Model, 2019
Protzman Charles, Protzman Dan, Keen William
A Pareto chart is a chart that contains a bar graph and a line graph such that the individual values are shown in descending order by bars, and the cumulative total is shown by the line. The left vertical axis is usually the frequency of occurrence and the right axis is the cumulative percentage of the total number of occurrences. The purpose of the Pareto chart is to highlight the most important factors and is used for root-cause analysis to focus on the most common sources of defects or the highest occurring type of defect. A Pareto waterfall chart is combining the Five-Why tool by creating multiple Pareto charts until the root cause is detected (see Figure 6.9).
Sandwich structure printing of Ti-Ni-Ti by directed energy deposition
Published in Virtual and Physical Prototyping, 2022
Aidin Farzaneh, Mahyar Khorasani, Ehsan Farabi, Ian Gibson, Martin Leary, AmirHossein Ghasemi, Bernard Rolfe
As can be seen, Sample 4 has cracks longer than 10 mm while there are three crack-free samples. To find the effect of the process parameters on the formation of the crack, Pareto chart and Main Effect analyses have been carried out. A Pareto Chart is a graph that identifies the frequency and impact of the defects. Pareto chart is useful for detecting the defects to prioritise in order to observe the greatest overall improvement (Nicolae, Nedelcu, and Dumitrascu 2015). The magnitudes of the effects of parameters are calculated based on the Pareto chart in Minitab, as shown in Figure 6. The Pareto chart shows that factor A that is laser power has the highest impact on the formation of the intermediate layer crack (the crack in Ni area) as well as in interface cracks.
Parametric study via full factorial design for glycerol supercritical gasification
Published in Biofuels, 2022
Houcinat Ibtissem, Outili Nawel, Weiss-Hortala Elsa, Meniai Abdeslam-Hassen
The previous sections have shown that the studied operating parameters had not the same effect on the DOE responses. To outline the effects of the factors and their interactions on a target response, the Pareto graph was used and it is a vertical bar graph in which values are plotted in decreasing order of relative frequency from left to right. Indeed, Pareto chart is useful for analyzing which variables have the greatest effect on a given response and allows taking a decision according to the objective of the study. Also, it can classify all the factors and their interactions and shows the significant ones using the critical t-value (12.71 for the obtained models) where the factors with absolute t_value greater than this critical one are considered as significant.
An application of the Pareto method in surveys to diagnose managers’ and workers’ perception of occupational safety and health on selected Polish construction sites
Published in International Journal of Occupational Safety and Ergonomics, 2018
Jerzy Obolewicz, Andrzej Dąbrowski
The results of the discussion were based on the Pareto principle, which made it possible to identify the key factors influencing the OSH level. A Pareto chart is a vertical bar graph in which values are plotted in decreasing order (from left to right). Pareto charts are very useful for analysing which problems need attention first, because the taller bars on the chart clearly illustrate which variables have the greatest cumulative effect on a given system. The Pareto chart provides a graphic depiction of the Pareto principle, a theory maintaining that 80% of the output in a given situation or system is produced by 20% of the input.