why outsource?
There are many reasons why organizations choose to outsource functions and services. The following is a list of common reasons why outsourcing is undertaken:

Lower costs
Specific supplier benefits. For example, better security, continuity, etc
Higher quality service due to focus of the supplier
Less dependency upon internal resources
Control of budget
Faster setup of the function or service
Lower ongoing investment required in internal infrastructure
Lack of internal expertise
Increase flexibility to meet changing business conditions
Improve Risk Management.
Acquire Innovative Ideas.
Turn fixed costs into variable cost.
And lots more…