The clothesline plot will display the variation of a parameter or fixed step from occasion to occasion and can show whether the steps we are measuring are within a set tolerance or not.
The example in the diagram below uses four fixed steps plotted as a running plot of a process.
The control limits or tolerances as some manufacturers call them are shown as dotted lines above and below the aim point horizontal axis.
These limits are set by manufacturers as being compromises between achievability and being visually noticeable.