The formula to calculate the production line capacity (PLC) is:
\[ PLC = \frac{S \times H \times E}{T} \]
Where:
Let's say the speed of the production line (S) is 100 units per hour, the number of working hours available (H) is 8 hours, the efficiency of the production process (E) is 0.9, and the time period considered (T) is 8 hours. Using the formula:
\[ PLC = \frac{100 \times 8 \times 0.9}{8} \]
We get:
\[ PLC = 90\, \text{units} \]
So, the production line capacity is 90 units.