Web service level agreement (sla) is a documented agreement between a service provider and a customer that identifies both the services required and the expected level of service. Web in logistics, a service level agreement is a contract between a business and a logistics partner that outlines the services to be provided and the performance level. A service level agreement, often abbreviated as sla, is used in it and professional services to. Web service level agreements (slas): Web a 3pl template is a list of questions that a company you’re thinking of outsourcing some of your logistics processes to should answer in its proposal to provide services for your.