Overhead (engineering)

From Wikipedia, the free encyclopedia
Jump to: navigation, search

In engineering, some methods or components make special demands on the system. The extra design features necessary to accommodate these demands are called overhead. For instance, in electrical engineering, a particular integrated circuit might draw large current, requiring a robust power delivery circuit and a heat-dissipation mechanism. In XML the date 2011-07-12 07:18:47.0000+0000 can be written as follows with an overhead of 180 characters, while adding the semantic context that it is a CHANGEDATE with index 1.

              <DATETIME qualifier="CHANGEDATE" index="1">
                 <YEAR>2011</YEAR>
                 <MONTH>07</MONTH>
                 <DAY>12</DAY>
                 <HOUR>07</HOUR>
                 <MINUTE>18</MINUTE>
                 <SECOND>47</SECOND>
                 <SUBSECOND>0000</SUBSECOND>
                 <TIMEZONE>+0000</TIMEZONE>
              </DATETIME>