Productivity is the measure of the work produced per unit of input (various cost items that are incurred). Although productivity is often thought of as relating to labor only, in practice it relates to any resources used to produce a result.
What is the Learning Curve?
A learning curve is a concept that shows graphically the relationship between the cost & output over a defined period of time, normally to represent the repetitive task of labor or worker. The learning curve was described in 1885 by psychologist Hermann Ebbinghaus & is used as a way to measure productivity efficiency & to forecast costs.
Learning Curve Theory
One of the most important issues in repetitive operations is the learning effect. It is obvious that a repetitive operation offers better opportunities to achieve high productivity. It is recognized that the productivity of labor improves when repetition is involved in an operation.
The learning curve theory is often applied in the construction industry where the work is repetitive & continuous.
For example, when the design calls for repeated utilization of the same concrete forms in a high-rise or multiple building construction, the productivity may be susceptible to learning curve analysis.
The same is true for rebar work, concrete placement, or the rough-in and finish work of the trades, as long as there is a relatively constant percentage reduction in the input required to produce an item as the production quantities double. For example, an 80% learning curve represents a 20% reduction in the time it takes to produce units one and two, an additional 20% reduction in the time it takes to produce units two and four, units four and eight, units eight and sixteen, etc.