What are advantage and disadvantage of SLA?

Answer 1

SLA makes business and customer interrelationship.It makes the the customer clearly known about what they expect from a quality service and refund or payment in case service was not properly delivered.

so sla makes a customer trained. for an example a service may be consisting of different services and each service has a different vendor. in that case if any service fails all other services may disturbs . So if customer has exact idea he will contact the exact fault service provider not all the service providers.