topic Re: How to visualize change in pareto rankings over time in Discussions

How to visualize change in pareto rankings over time

markschahl — Fri, 02 Mar 2018 20:45:55 GMT

I work in manufacturing. One improvement activity that I do is analyze loss data. Losses occur when we don't meet production targets. Causes for losses are assigned. These data lend themselves well to analysis using Pareto Charts. I was doing that this morning and when this question came to mind "how do the top 15 causes change with time?". I came up with the following bubble chart. Two questions:

Can you think of a better way to visualize this?
Is there a better formula to get the rank highest to lowest? Look at the formula for Year.Rank.

Data have been anonymized and randomized...

Thanks in advance!

Re: How to visualize change in pareto rankings over time

jerry_cooper — Sat, 03 Mar 2018 03:19:38 GMT

I'm partial to Tree Maps when trying to display this type of data, they pack a lot of info into a small space:

Although not necessary to create the above visual, your rank column could be used to subset the table to the values 1 thru 15 and then combined with the data filter you could answer the specific question "how do the top 15 causes change with time":

Just one idea, I'm sure there are more.

Re: How to visualize change in pareto rankings over time

XanGregg — Tue, 06 Mar 2018 14:33:29 GMT

Hi Mark,

1. It's hard to beat line charts for changes over time.Below is a small multiples view of all the causes that ever make the top 15, ordered by the average rank. If you use a Group X instead of Group Wrap, you would get a layout similar to your bubble view.

2. I think the formula could be simplfied to Col Rank( -:Loss.Amount, :Time ).

Graph Builder(
	Size( 728, 731 ),
	Show Control Panel( 0 ),
	Variables(
		X( :Time ),
		Y( :Year.Rank ),
		Wrap( :Loss.Cause,
			Order By( :Year.Rank, Ascending, Order Statistic( "Mean" ) )
		)
	),
	Elements(
		Line( X, Y, Legend( 11 ),
			Missing Factors( "Treat as Missing" ),
			Missing Values( "Connect Faded" )
		)
	),
	Local Data Filter(
		Add Filter(
			columns(
				Transform Column(
					"Minimum[Year.Rank][Loss.Cause]",
					Formula( Col Minimum( :Year.Rank, :Loss.Cause ) )
				)
			),
			Where(
				Transform Column(
					"Minimum[Year.Rank][Loss.Cause]",
					Formula( Col Minimum( :Year.Rank, :Loss.Cause ) )
				) >= 1 & Transform Column(
					"Minimum[Year.Rank][Loss.Cause]",
					Formula( Col Minimum( :Year.Rank, :Loss.Cause ) )
				) <= 15
			)
		)
	),
	SendToReport( Dispatch( {}, 	"Year.Rank", ScaleBox,
		{Min( 20 ), Max( 0 ), Inc( 10 ), Minor Ticks( 1 )})
	)
)

Re: How to visualize change in pareto rankings over time

markschahl — Sat, 10 Mar 2018 14:22:18 GMT

Jerry:

Thanks! Sorry for the delayed reply, was busy with meetings last week. I took your idea of using a treemap and made one change since V2 values are text strings of up to 20 characters: I used Color Theme Spectral. This made it really easy for the eyes to compare the rectangles for a given V2 value from one time period to another.

Graph Builder(
Size( 1523, 678 ),
Show Control Panel( 0 ),
Show Legend( 0 ),
Continuous Color Theme( "Spectral" ),
Categorical Color Theme( "Spectral" ),
Variables(
X( :Pareto.Category ),
Y( :Losses ),
Wrap( :Year ),
Color( :Pareto.Category )
),
Elements( Treemap( X, Y, Legend( 4 ), Layout( "Squarify" ) ) ),
SendToReport(
Dispatch( {}, "graph title", TextEditBox, {Set Text( "2010-2017 Losses" )} ),
Dispatch(
{},
"Graph Builder",
FrameBox,
{DispatchSeg( TreeMapSeg( 1 ), Frame Size( 499, 176 ) )}
),
Dispatch(
{},
"Graph Builder",
FrameBox( 2 ),
{DispatchSeg( TreeMapSeg( 1 ), Frame Size( 498, 176 ) )}
),
Dispatch(
{},
"Graph Builder",
FrameBox( 3 ),
{DispatchSeg( TreeMapSeg( 1 ), Frame Size( 499, 176 ) )}
),
Dispatch(
{},
"Graph Builder",
FrameBox( 4 ),
{DispatchSeg( TreeMapSeg( 1 ), Frame Size( 499, 177 ) )}
),
Dispatch(
{},
"Graph Builder",
FrameBox( 5 ),
{DispatchSeg( TreeMapSeg( 1 ), Frame Size( 498, 177 ) )}
),
Dispatch(
{},
"Graph Builder",
FrameBox( 6 ),
{DispatchSeg( TreeMapSeg( 1 ), Frame Size( 499, 177 ) )}
),
Dispatch(
{},
"Graph Builder",
FrameBox( 7 ),
{DispatchSeg( TreeMapSeg( 1 ), Frame Size( 499, 176 ) )}
),
Dispatch(
{},
"Graph Builder",
FrameBox( 8 ),
{DispatchSeg( TreeMapSeg( 1 ), Frame Size( 498, 176 ) )}
)
)
)

Re: How to visualize change in pareto rankings over time

markschahl — Sat, 10 Mar 2018 14:43:59 GMT

Xan:

Thanks! Sorry for the delayed reply - was in meetings all week. I like your solution! As we work on improvements, we always ask "Is last year's #1 problem still #1 this year?" The #1 should go down in rank (move to the right on a pareto chart), or if still #1 should get smaller. The line chart is a great way to see change in rank. Combining the line chart and Jerry's treemap solution (which shows the magnitude of the losses) really helps tell the story of where we are making progress.

One question: was the script your posted created only by point-click in GraphBuilder or did you have to edit the Save to data table script?

I'm looking forward to using a Local Data Filter for time and JMP14 Packed Bars to re-analyze this data!

Re: How to visualize change in pareto rankings over time

XanGregg — Sat, 10 Mar 2018 23:30:08 GMT

Great, Mark. It was all point and click. The only tricky part was adding the transform column in the data filter.