If you are adding capacity. Focus observe points to cover costs and efficiency of capacity will be increased. If you consider that increasing the production capacity to make up it cost should not be added.
To increase capacity The consideration to breakeven and performance capacity is increased. If determined that the increased production costs rise, it should not increase.
To increase production. The consideration to the break-even point and the efficiency of production capacity will increase. Considering that the capacity to make the higher costs should not be added.