We will focus only on analysing the impact of maintenance on the productivity index, since it is hard to trace the changes in the price recovery index. This is because the price recovery is affected by the fluctuation of the external and uncontrollable factors that have an effect on the products’ prices or input costs, furthermore, time length of production can be improved by prolonged machine life due to effective maintenance. Based on this model, we can show how does maintenance affect the profitability of a business by increasing the total productivity. In general the improvement in productivity can occur by one of the following ways