a Scatter chart
b Pareto diagram
d Cause and effect diagram
The module says that the correct ans is B. But my doubt is why not C ? Because Pareto is more about identifying the 'vital few' and it is created by rearranging the Histogram (https://www.youtube.com/watch?v=BXaMq2trk18). Here the question asks only about "quantifying & categorizing" and not about "vital few". So I feel that Histogram serves the purpose.
"A Pareto Diagram helps the management team quantify and categorize defects. Pareto diagrams/ charts are used to identify the vital few sources that are responsible for causing most of the critical defects. Option A – Scatter diagrams use two variables, input variable is called an independent variable and output variable is called a dependent variable. Scatter diagrams display the relationship between these two elements as points on a graph. Option C – Histogram is bar chart which shows distribution of variables and cannot be used to quantify and categorize defects. Option D – Cause and effect diagram is also known as Fishbone diagram. It is used to find the actionable root cause of a problem."
You then need to check out with Control limit and Isjiwaka diagram too to find out root cause for mitigation.
My point of view if you have bunch of defects you need to categorize first. then judge with control charts whether those are in acceptable limit or so. Then you need to find out root cause.
There are no hard and fast rule in order described in PMBOK , Rita or Andy Crowe . Every company has their own Quality Control System. There are ISO standard too and PMBOK explanation they are not the rules but guidelines!
Hopefully, that clears the question and doubts!
Histograms are 2 dimensional ie. between 2 parameters (Maybe Quantity and Category) and Pareto's are 3 dimensional
In this case: we have one more additional dimensions that is named as "Source"
So if we plot it using the mentioned COntrol tools
Imagine the histogram ordered by the priority of sources -> plotted as categories vs Quantities
which makes it a Pareto chart
Any comments Folks ?
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