====PCC Charts====

Parallel Coordinate Charts are used to compare how values are spread across a number of points at a single time. 

They're used when you have too many different measurements for a scatter plot to be useful. In particular, when your points have different //ranges//,  as scatter-plots are only useful when your measurements share a similar minimum and maximum value.

They're like a line chart, but the ticks on the X axis represent different //measurement points// instead of //times//.

Each item on the X axis has it's own unique scale, meaning that assets with radically different scales can be directly compared to one-another.

Each line on a PCC chart represents a single moment in **time**. For example, one line will show the values for each point at 08:00, while the next will show the values at 08:02.

===Example===

The chart below is comparing 6 points on our Paint Line - a system that runs a product of varying thickness and width through rollers.

{{pccexample.png|600}}

^Points (From Left to Right)^
|Paint Line Actual Speed|
|Roller Actual Speed|
|Paint Line Target Speed|
|Roller Target Speed|
|Product Thickness|
|Product Width|

You can see that each asset has it's own unique Y axis. This lets us directly compare properties like //speed// - measured in meters-per-minute - with //thickness//, which is measured in millimeters.

Remembering that each line is a different point in //time//, we can see that generally the target and actual speeds tend to stay quite close together, with the **actual** speeds showing more movement and noise than the target speeds, but both are sticking fairly close together.

The product **thickness** appears to be the //inverse// of our speed. The greater the //speed//, the lower the //thickness//. In this case, it indicates that the line has to run thicker products slower.

The product **width** is less strongly related than the other values. This indicates that it might not be directly related to the other measurements, or that it's relationship is complex.