A customizable work measurement tool that includes a data gathering tools to facilitate work sampling. A display device according to an exemplary embodiment of the present invention includes a first pixel adapted to display a first color, a second pixel adapted to display a second color, a third pixel adapted to display a third color, and a white pixel adapted to display a first white. Between each pair of through-slots, longer axial slots are formed that extend only partially through the sidewall radially, and almost the entire length of the piston. The method includes generating one or more use scenarios based on the modeling language representation and generating one or more validation test suites based on the one or more use scenarios. The guide unit guides the sheet received in the discharged-sheet receiving device to be removed so that the sheet does not interfere with the receiving frame when the sheet is removed.