<b>Definition.</b><br/>The accumulated time during a Task which is spend on a certain <b>WorkElement</b>.<br/><br/><b>Remark.</b><br/>WorkElement is a constituent part of an <b>Operation</b>. The length (breakpoints between WorkElement's) will be determined by the nature of the investigation but must be defined by breakpoints which indicate the instant from/to which the WorkElement is timed. (after Biesalski, 1954).<br/>