When an item or service costs more money or time to produce than the return you gain from it, then it can be said to be inefficient.
Obviously this will vary with the item concerned.
You lose a lot of efficiency, since resistance heaters make heat off being inefficient.
It is usually not energy that is efficient or inefficient. Rather, the technology used to extract it may be efficient or inefficient. In the case of any heat energy, the upper limit to the efficiency is given by the Carnot equation for heat engines, and depends on the temperature of the heat source, as well as the environmental temperature.
Process efficiency is important so that there is very little wastage of time and resources. Inefficient processes lead to many interruptions or a poor end product.
Incandescent light bulbs are inefficient at converting energy into light. They are so inefficient that in many places there is no a ban on the sale or manufacture of incandescent light bulbs in favor of higher efficiency CFLs, LEDs, or halogen lights.
Energy inefficiency can be caused by factors such as poor insulation, outdated technology, lack of maintenance, and inefficient equipment. These can lead to energy losses in the form of heat, friction, or other forms of waste. Identifying and addressing these factors can help improve energy efficiency.
inefficient
Uneconomical, wasteful or inefficient.
Because it is one of the reasons why business may cease to operate. If the operations management is found to be inefficient or ineffective, usually, the operations manager is replaced or fired.
The man was inefficient at performing his mandatory task.
Barter is an inefficient means of exchange because
Efficiency is greatest when diminishing returns is at its most efficient point. In a possibilities frontier if I have two items, I want to make sure I am not over-producing one item or the other because then my opportunity costs are high and that is inefficient.
boiler efficiency is how much water is converting to steam.