Why does a business often reach a point at which adding more resources does not increase productivity or profits at the same rate it used to? (diminishing returns, stages of production)

diminishing returns

Explanation:

Diminishing returns are based on the economic concepts founded on the law of diminishing marginal returns. This law provides that after some optimal production level is achieved, the continuous addition of input will lead to a decreased output rate.

Diminishing returns is when productivity increases at a decreasing rate as more input are used while holding other factors constant. Once productivity arising from an input hits its peak, additional employment of that resource will result in a decreased or negative productivity.  For example, if input labor is added to a factory, new workers will improve productivity until the factory reaches its maximum capacity. Hiring more workers after the factor hits its peak will result in a decline in labor productivity.