Three important issues to be considered when adding or decieasing capacity are: Multiple Choice number of workers, the skit of those workers, and how fast workers can be added or reduced. number of workers, the skill of those workers, and vie of external capocity. maintaining system balance, frequency of capacity additions or feductions, and use of external copacity number of workers, frequency of capacity addaions or reductions, and use of external capacity. the skill of workers, the cont of workers, and how fast workers can be added or reduced