Service level must be defined well before you offer any service to anyone. What is covered in the service and what is not?
To what extent this service can be increased must be discussed well in your agreement about service level agreement. A good example of it is provided here in the form of service level agreement template available free of cost. Just download it and then print on some quality paper and then fill in the blanks and you are done with it. Although its perfect in its range and scope yet we advise you to consult some authority before you finalize it.
Here is a preview of this service level agreement template.
Click on the download button to use this service level agreement template totally free.