Efficiency is calculated with the efficiency formula. Efficiency is one factor that can be considered in strategy, planning and decision making but it's not everything. Over-optimizing for efficiency can produce negative results because efficiency calculations seldom consider everything involved in value. For example, the definition of transportation efficiency above doesn't include things like safety and comfort. As such, if you over-optimized for this definition of efficiency, you might end up with a bleak type of transportation.
Energy EfficiencyValue produced by a unit of energy.
Time EfficiencyValue produced in a period of time.
Cost EfficiencyValue produced by spending.
Quality EfficiencyValue produced by the unit cost of a product or service e.g. a reasonably inexpensive product that’s high quality.
Material EfficiencyValue produced by a unit of material such as wood, plastic or metal.
Labor EfficiencyValue produced in an hour, week, month or year of work. Better known as productivity.
Process EfficiencyThe value produced by a process relative to the resources it consumes.
Output EfficiencyThe ratio of outputs to inputs.
Resource EfficiencyThe outputs created by a unit of a resource such as water.
Space EfficiencyThe value created per square foot of space.
Information EfficiencyThe degree to which information has been reflected in decisions, strategy and market prices.
Inventory EfficiencyHow quickly your average unit of inventory sells.
Capacity EfficiencyThe value produced by a unit of capacity such as an hour of CPU time.
Service EfficiencyThe value such as customer satisfaction produced by a service relative to resources consumed.
Training EfficiencyThe outcome of training such as knowledge and skill relative to the resources such as time and cost consumed.
Capital EfficiencyThe value produced per dollar of deployed capital.
Employee EfficiencyThe value such as revenue produced per employee relative to the all-in costs of your employees.
Data EfficiencyThe value produced per data record.
Transportation EfficiencyThe resources such as time and energy consumed to transport a person a mile.