 Per Jeremy Greenwood et al., GHP is overlooked by many people and seen as unimportant.Derek Ironmonger has stated that the GHP is the measure of a family's production of goods and services they use and accumulate themselves such as chores and other traditionally unpaid household duties.He has further stated that the "major scientific achievement of [the field of household production has been the accurate measurement of the magnitude of household production through surveys of the uses of time" and that quarterly accounts of GHP will make it easier to produce scientific research.