Capacity is Maximum Output with the Resources Currently Available
The capacity of an organisation is the maximum output that it can produce in a given period without buying any more fixed assets- machinery, factory space, etc.
Capacity depends on the number of employees and how skilled they are.
It also depends on the technology the business has — what machinery it has, what state it's in. what kind of computer system it has etc.
The kind of production process the business uses will also affect its capacity.
The amount of investment in the business is also a factor.